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03-18-2014, 07:24 PM
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#1
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VNO
1975 Argosy 24
Germantown
, Tennessee
Join Date: Aug 2011
Posts: 118
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Mirror Finish v. Satin Finish?????
Ya'll,
We are looking at a 74 31 footer. First, I can't tell if it is clearcoat coming off, or corrosion. How do you tell the difference?
Also, the owner says it's a "satin" finish v. a mirror finish. This make sense or is Aluminium just.....aluminum and once the clearcoat is gone and the corrosion buffed out, it will shine?
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03-19-2014, 02:24 PM
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#2
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flygrrl
1962 19' Globetrotter
Winchester
, Ontario
Join Date: Jul 2011
Posts: 251
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It is probably an anodized finish, an electrolytic process used to protect the aluminum. Anodic films are most commonly applied to protect aluminium alloys.
Anodization changes the microscopic texture of the surface and changes the crystal structure of the metal near the surface. Anodized aluminium surfaces, for example, are harder than aluminium but have low to moderate wear resistance that can be improved with increasing thickness or by applying suitable sealing substances. Anodic films are generally much stronger and more adherent than most types of paint and metal plating, but also more brittle. This makes them less likely to crack and peel from aging and wear, but more susceptible to cracking from thermal stress.
I am not sure when the switch was made with Airstreams but I think it was 1969-70. One of our venerable historians will probably chime in with the exact year.
Apparently you can shine an anodized trailer but it is much more work and never gets to that truly mirror finish because basically what an anodized finish is is really thick corrosion done on purpose.
__________________
TV: 2007 Jeep GC Laredo diesel
Toy: 1995 Jeep YJ
Experience is what you get from not having it when you needed it.
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03-19-2014, 02:59 PM
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#3
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Rivet Master
1964 17' Bambi II
Vintage Kin Owner
Schererville
, Indiana
Join Date: Jul 2005
Posts: 2,637
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None of the Airstreams have ever been anodized. Avion had them, along with several other defunct aluminum trailer manufacturers, but not Airstreams. A satin finish is what a 1974 trailer has. If the clear coat is shot (peeling, or wearing through), you will still have a satin finish if/when you remove the clear coat. A mirror finish was never manufactured at the factory, but accomplished by people who have done it themselves, or had a professional service do it. It's a long, tedious process that can be accomplished, with the right tools, by anyone determined enough to do it! Hope that answers your question.
__________________
Becky
1964 Bambi II
1988 Avion 32S
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03-19-2014, 05:12 PM
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#4
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Rivet Master
1956 22' Safari
2015 27' Flying Cloud
Vintage Kin Owner
Conifer/Evergreen
, Colorado
Join Date: Feb 2002
Posts: 12,702
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Quote:
Originally Posted by Eaglemate
Ya'll,
We are looking at a 74 31 footer. First, I can't tell if it is clearcoat coming off, or corrosion. How do you tell the difference?
Also, the owner says it's a "satin" finish v. a mirror finish. This make sense or is Aluminium just.....aluminum and once the clearcoat is gone and the corrosion buffed out, it will shine?
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It can be both. When the clearcoat starts failing, the exposed aluminum starts to oxidize - unevenly at that. The areas that have been exposed longer will be more oxidized and the areas still protected by the clearcoat will not have oxidized yet.
To determine if you do still have clear coat: - wash a small test area with warm soapy water
- let it dry
- take a tiny dab of toothpaste and gently rub it on the clean skin with your finger
- if it turns black > no clearcoat
- if it doesn't turn black > there is still intact clearcoat
The clearcoat when it fails can look "milky" - if you strip it, the aluminum underneath can still be shiny - but areas adjacent will be unaffected by stripping. As mentioned before, Airstreams were never "mirror-like" or annodized when new. The "satin" finish is a mill finish on the aluminum from manufacturing which can be polished out to a mirror finish if desired.
Shari
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03-19-2014, 05:19 PM
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#5
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Rivet Master
1964 19' Globetrotter
South Kingstown
, Rhode Island
Join Date: Dec 2004
Posts: 1,406
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After a weekend rally, I'm thinking again about stripping the failing clearcoat, but wondering about just leaving it stripped, not polishing it to a high shine. What would happen? We have a portion that a previous owner randomly tried to strip, and it has a kind of matte/anodized look, rather than the clearcoat or being buffed out, and it's been okay for the years we've had it... curious to get someone else's take. Thanks
__________________
Wherever you go, there you are
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03-19-2014, 05:24 PM
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#6
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Rivet Master
1956 22' Safari
2015 27' Flying Cloud
Vintage Kin Owner
Conifer/Evergreen
, Colorado
Join Date: Feb 2002
Posts: 12,702
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Quote:
Originally Posted by Globie64
After a weekend rally, I'm thinking again about stripping the failing clearcoat, but wondering about just leaving it stripped, not polishing it to a high shine. What would happen? We have a portion that a previous owner randomly tried to strip, and it has a kind of matte/anodized look, rather than the clearcoat or being buffed out, and it's been okay for the years we've had it... curious to get someone else's take. Thanks
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It will oxidize over time. If it is splotchy from uneven odidation that has already started it will still be splothchy. But over the years, it will blend in.
Shari
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03-19-2014, 05:40 PM
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#7
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Rivet Master
1976 31' Sovereign
Missouri City
, Texas
Join Date: Mar 2007
Posts: 1,233
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Quote:
Originally Posted by beckybillrae
None of the Airstreams have ever been anodized. Avion had them, along with several other defunct aluminum trailer manufacturers, but not Airstreams. A satin finish is what a 1974 trailer has. If the clear coat is shot (peeling, or wearing through), you will still have a satin finish if/when you remove the clear coat. A mirror finish was never manufactured at the factory, but accomplished by people who have done it themselves, or had a professional service do it. It's a long, tedious process that can be accomplished, with the right tools, by anyone determined enough to do it! Hope that answers your question.
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I beg to differ, there is shinny aluminum under that old clear coat. On my 1976 31' Sovereign when I rescued it in 2000 there was still clear on the side but it had been out in a muddy field for about 10 years so the clear coat was milky looking and running down the side. So I stripped it.
Here are the before and after pictures back in 2000.
Airstream strip clear coat.pdf
It looked so good I did not do anything else to the finish except wash and travel. The end caps always were a little less shinny but it still looked good. In 2010 I decided that I wanted to go to the next level and had it buffed and new clear coat applied by Oasis RV in Tuscon. Here is what it looks like today.
Dons 1976 Airstrem 2010.pdf
__________________
Don Hardman
1976 31' Sovereign
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03-19-2014, 05:56 PM
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#8
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Rivet Master
1976 31' Sovereign
Missouri City
, Texas
Join Date: Mar 2007
Posts: 1,233
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Quote:
Originally Posted by Globie64
After a weekend rally, I'm thinking again about stripping the failing clearcoat, but wondering about just leaving it stripped, not polishing it to a high shine. What would happen? We have a portion that a previous owner randomly tried to strip, and it has a kind of matte/anodized look, rather than the clearcoat or being buffed out, and it's been okay for the years we've had it... curious to get someone else's take. Thanks
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It depends on how you take care it. My 1976 was always stored after I got in 2000 in a enclosed storage spot. I washed and use the liquid car wash/wax when ever I took it out on trips. The finish lasted very without clear coat after it was stripped in 2000. Here is a picture taken in 2008, 8 years after the clear coat was stripped.
Dons Airtsrem before new Clear Coat.pdf
Still looked good. So go ahead and strip it and enjoy the new look and take care of it and it will look good for a long time. As covered in my earlier post I decided in 2010 to have mine buffed and new clear coat applied. It is not the shinny as a new dime look at some that are polished out, but I like it. Post some pictures so we can see how yours looks. Good luck
__________________
Don Hardman
1976 31' Sovereign
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03-19-2014, 06:31 PM
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#9
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Rivet Master
1969 31' Sovereign
Broken Arrow
, Oklahoma
Join Date: Jan 2003
Posts: 1,455
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Striping and polishing is a major job but to me the results were worth it.
There are shops and individuals that strip & polish it is expensive around $100 a foot.
Post a picture and that may help to identify what is going on but I would guess the clear coat is coming off and the aluminum is oxidized.
Fairly common problem on older Airstreams.
__________________
Garry
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03-19-2014, 08:35 PM
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#10
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Rivet Master
1964 17' Bambi II
Vintage Kin Owner
Schererville
, Indiana
Join Date: Jul 2005
Posts: 2,637
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Quote:
Originally Posted by adonh
I beg to differ, there is shinny aluminum under that old clear coat. On my 1976 31' Sovereign when I rescued it in 2000 there was still clear on the side but it had been out in a muddy field for about 10 years so the clear coat was milky looking and running down the side. So I stripped it.
Here are the before and after pictures back in 2000.
Attachment 207842
It looked so good I did not do anything else to the finish except wash and travel. The end caps always were a little less shinny but it still looked good. In 2010 I decided that I wanted to go to the next level and had it buffed and new clear coat applied by Oasis RV in Tuscon. Here is what it looks like today.
Attachment 207845
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Here are a few pix of a '76
First is before clear coat removal: (satin finish)
Second is a picture of a partial mirror finish--note the top of the endcap....this has just had the clear coat removed, but isn't polished
Last is the final mirror finish. You can clearly see the reflection of my house....like a mirror.
__________________
Becky
1964 Bambi II
1988 Avion 32S
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03-20-2014, 07:40 AM
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#11
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Rivet Master
1956 22' Safari
2015 27' Flying Cloud
Vintage Kin Owner
Conifer/Evergreen
, Colorado
Join Date: Feb 2002
Posts: 12,702
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Quote:
Originally Posted by adonh
I beg to differ, there is shinny aluminum under that old clear coat.
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Shiny . yes. It will be shinier than milky failing clear coat, but it will not have the mirror finish unless polished. Polishing removes the satin mill finish that is standard on the aluminum panels from the factory. Airstreams were never polished when new - they just had new aluminum with the slightly milled finish in the 70's.
Many are satisfied with the mill finish under the clear coat. I might be if the splotchy oxidation from the clear coat failing hasn't begun. Regardless, the first step to polishing is stripping off the clear coat (on most post-50's trailers) - do that and live with it awhile then decide if you want to take it to the next level.
Shari
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03-20-2014, 07:56 AM
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#12
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3 Rivet Member
1998 30' Excella 1000
Halifax
, Nova Scotia
Join Date: Sep 2012
Posts: 137
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All depends on what you like...the time and energy you have to polish, etc. We really needed to look after the top half of our '98 Excella...it was in rough shape. The bottom was fine. So I only polished the top half last year and left the bottom as is. Here is the before and after photo. Many have said they like the two tone look of the top and bottom.
__________________
David & Andrea
'98 Excella 1000 Classic 30ft
2007 Toyota Tundra Dbl Cab
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03-20-2014, 02:21 PM
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#13
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3 Rivet Member
2009 19' International
Woodinville
, Washington
Join Date: Apr 2011
Posts: 191
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A warning about "mirror" finishes: My neighbor boondocking at Quartzsite, AZ, had a 28' AS that he had polished to a mirror finish. The sun's reflection off the trailer created burn holes in the ground cloth next to the trailer; a real fire hazard.
__________________
DonS
"It's like magic, only real"
(Bud Light commercial)
Women and cats can do as they please, while men and dogs should relax and get used to the idea.(R. Heinlein)
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03-20-2014, 06:10 PM
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#14
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Rivet Master
2015 30' Classic
2012 28' International
Greensboro
, North Carolina
Join Date: Aug 2011
Posts: 1,708
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I was in a park in West Texas last year. The owner told me that he had to ask a "polished" Airstream to relocate as he'd had complaints about the glare from other campers! I thought I'd heard everything....
__________________
_________________
"SilverLeaf II" 2015 30' Classic
2019 RAM 2500 Limited 4x4 CC w/6.7L Cummins
ProPride 3P
AIR# 58452
WBCCI # 3430-Unit 21
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03-21-2014, 09:32 AM
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#15
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Rivet Master
1956 22' Safari
2015 27' Flying Cloud
Vintage Kin Owner
Conifer/Evergreen
, Colorado
Join Date: Feb 2002
Posts: 12,702
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Quote:
Originally Posted by 50KIP
A warning about "mirror" finishes: My neighbor boondocking at Quartzsite, AZ, had a 28' AS that he had polished to a mirror finish. The sun's reflection off the trailer created burn holes in the ground cloth next to the trailer; a real fire hazard.
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Yep...and you can fry an egg! I've done it...
Shari
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03-21-2014, 07:47 PM
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#16
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Rivet Master
1964 19' Globetrotter
South Kingstown
, Rhode Island
Join Date: Dec 2004
Posts: 1,406
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I can understand the glare off an shiny trailer being an issue. I'd just like to get rid of the milky/crazed finish. If it gets a mill finish, more matte, I'm fine with that. We also have some weird spots where shrubs rubbed against the roof while the trailer lived in our backyard in Oakland. I figger I can strip the coating and then at some later point in time, buy a buffer and dive into it.
__________________
Wherever you go, there you are
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03-22-2014, 09:09 AM
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#17
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flygrrl
1962 19' Globetrotter
Winchester
, Ontario
Join Date: Jul 2011
Posts: 251
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Quote:
Originally Posted by beckybillrae
None of the Airstreams have ever been anodized. Avion had them, along with several other defunct aluminum trailer manufacturers, but not Airstreams. A satin finish is what a 1974 trailer has. If the clear coat is shot (peeling, or wearing through), you will still have a satin finish if/when you remove the clear coat. A mirror finish was never manufactured at the factory, but accomplished by people who have done it themselves, or had a professional service do it. It's a long, tedious process that can be accomplished, with the right tools, by anyone determined enough to do it! Hope that answers your question.
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Thanks Becky, my mistake!
Leonie
__________________
TV: 2007 Jeep GC Laredo diesel
Toy: 1995 Jeep YJ
Experience is what you get from not having it when you needed it.
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03-22-2014, 09:44 AM
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#18
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4 Rivet Member
1985 32.5' Airstream 325
Lindsay
, Ontario
Join Date: Aug 2010
Posts: 479
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I love the look of the polished ones but is it possible to repair just the failing clear coat with out having to strip the complete in my case coach. Mine is failing on the roof and end caps and about 6 inches below the awning.
The sides are in good shape, I cleaned the oxidation on the sides with plastic headlight polish and a buffer and they are fine. I would like to the failing clear coat but not quite sure how to do it with out making it look worse.
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03-23-2014, 10:49 AM
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#19
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Rivet Master
1964 19' Globetrotter
South Kingstown
, Rhode Island
Join Date: Dec 2004
Posts: 1,406
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I've wondered about that, trying to repair a failing finish on a lot of things. I think with a plastic finish, it's probably impossible to do. If you go over it again, it'll look weird and lumpy. You can't really re-liquify it to smooth it out (always my concept, I think it works with varnishes and oils on wood). Maybe contacting one of the professional Airstream restorers to see what they'd do?
__________________
Wherever you go, there you are
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06-15-2021, 06:59 PM
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#20
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1 Rivet Member
1980 31' Excella II
Twentynine Palms
, California
Join Date: May 2019
Posts: 16
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Who can do a satin or matte finish in Southern CA?
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