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12-11-2012, 12:27 PM
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#1
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3 Rivet Member
1969 23' Safari
Athens
, Georgia
Join Date: Sep 2010
Posts: 128
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Any idea as to what type of plastic was used on reefer scoop and wheel wells?
I removed my refer scoop and, naturally, it has many cracks and holes. Also, the wheel wells are cracked. Any idea what kind of plastic was used for these? They look like they are made out of the same material.
Main question-any easy fix for these holes and cracks? Since they are not visible, I am not that concerned with appearance; and I am not very handy
I bought bondo fiberglass repair kit but a friend says he thinks it will eat through the plastic. Ideas? I read the plastic shavings in acetone thread and am not up for that kind of project. Thanks!
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12-11-2012, 12:33 PM
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#2
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Rivet Master
2006 23' Safari SE
Biloxi
, Mississippi
Join Date: Nov 2011
Posts: 8,278
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Instead of repairing, how about using the old ones as molds and making new ones using fiberglass cloth and epoxy resin. It is actually a really simple process plus will learn a new skill that might come in handy sometime in the future.
__________________
MICHAEL
Do you know what a learning experience is? A learning experience is one of those things that says "You know that thing that you just did? Don't do that."
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12-11-2012, 02:23 PM
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#3
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Rivet Master
Airstream Dealer
Corona
, California
Join Date: Feb 2002
Posts: 16,497
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Quote:
Originally Posted by sarasafari
I removed my refer scoop and, naturally, it has many cracks and holes. Also, the wheel wells are cracked. Any idea what kind of plastic was used for these? They look like they are made out of the same material.
Main question-any easy fix for these holes and cracks? Since they are not visible, I am not that concerned with appearance; and I am not very handy
I bought bondo fiberglass repair kit but a friend says he thinks it will eat through the plastic. Ideas? I read the plastic shavings in acetone thread and am not up for that kind of project. Thanks!
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The reefer scoop also vents the burner, a source of carbon monoxide.
It's far better to replace it with a fiberglass scoop, that will out last the trailer.
That scoop is not that expensive.
Also, the current wheel well covers, both inside and out, are very reasonable.
Shipping however, is a different matter.
Andy
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12-12-2012, 05:25 AM
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#4
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"Cloudsplitter"
2003 25' Classic
Houstatlantavegas
, Malebolgia
Join Date: Jun 2007
Posts: 20,000
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Quote:
Originally Posted by sarasafari
I removed my refer scoop and, naturally, it has many cracks and holes. Also, the wheel wells are cracked. Any idea what kind of plastic was used for these? They look like they are made out of the same material.
Main question-any easy fix for these holes and cracks? Since they are not visible, I am not that concerned with appearance; and I am not very handy
I bought bondo fiberglass repair kit but a friend says he thinks it will eat through the plastic. Ideas? I read the plastic shavings in acetone thread and am not up for that kind of project. Thanks!
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A lot will depend on the extent of the holes and cracks....photo's would help.
That said I have had good luck repairing composite materials with a mixture of marine epoxy and wood flour,(fine sawdust).
Worked very well re-securing the shower door frame to the wall.
Bob
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12-12-2012, 05:49 AM
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#5
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Rivet Master
1977 31' Sovereign
1963 26' Overlander
1989 34' Excella
Johnsburg
, Illinois
Join Date: Jul 2005
Posts: 2,944
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You can identify the plastics with a burn test. Polyethylene smells like a burning candle and has a yellow flame. ABS has a styrene smell and black smoke. Polypropylene has a very mild characteristic odor, PVC has a green flame and a violent acidic odor. Heating a paper clip in a propane torch flame and contacting the part will melt into a thermal plastic, but not a thermal set, like fiberglass. Recent thermoplastic parts have a recycle code molded into them, to tell what they are. PP= polypropylene, PE= polyethylene, PS= polystyrene, PVC, PET = polyethylene teraphalate. etc. It is difficult to get a good bond to PE or PP. Welding is your answer for these two materials.
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12-12-2012, 06:04 AM
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#6
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Rivet Master
1978 29' Ambassador
1974 25' Tradewind
1974 27' Overlander
Indiana
, Pennsylvania
Join Date: Sep 2003
Posts: 677
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Andy are the refer scoops still available for the older vintage Airstreams? It is my understanding they are not? Thanks!
Bob
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12-12-2012, 06:52 AM
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#7
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Rivet Master
1968 24' Tradewind
Oxford,
, Mississippi
Join Date: May 2009
Posts: 1,564
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I fixed the refrig.vent (and lots of other plastic parts) on my 68 TW with West System epoxy and fiberglass cloth. The epoxy resin is used by boat builders and composite airplane builders. It will do a better job on plastics than polyester resin, (more flexible and adheres better). You can get the West Epoxy at any marine supply or aircraft supply company. It will be a lot cheaper than buying and shipping on a new one.
__________________
__________________
Bruce & Rachel
__________________
68 Trade Wind
2001 Toyota Tundra
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12-12-2012, 07:13 AM
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#8
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Rivet Master
2002 25' Safari
1977 20' Argosy 20
northern valley
, new jersey
Join Date: Nov 2008
Posts: 532
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" Andy are the refer scoops still available for the older vintage Airstreams? It is my understanding they are not? Thanks!
Bob "
afaik, the factory does not, but Inland Andy does....
__________________
Joseph & Gabrielle
Simplicity is the ultimate sophistication - Leonardo da Vinci.
WBCCI 2087 - AIR 3144 - TAC-NJ2
https://defendwally.org/
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12-12-2012, 07:27 AM
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#9
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Rivet Master
Airstream Dealer
Corona
, California
Join Date: Feb 2002
Posts: 16,497
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Quote:
Originally Posted by Roadrunner
Andy are the refer scoops still available for the older vintage Airstreams? It is my understanding they are not? Thanks!
Bob
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They are no longer available from Airstream.
We have them made with fiberglass.
Andy
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12-12-2012, 07:53 AM
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#10
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Rivet Master
1964 26' Overlander
Richmond
, Virginia
Join Date: Feb 2011
Posts: 790
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Just my 2 cents: I have a 64. The refer scoop is almost certainly made of fiberglass. Same as the end caps though the inside part of the endcap cabinet is thermoform. The wheel wells are theromoform plastic, probably.
For the scoop, I would suggest a fiberglass kit. They have small ones at Lowes and HD now. The resin should help glue yours back together (mine is cracked at the rivets as well, but haven't wanted to take it down yet). For the wheel wells, I had great luck with the multi -cement in plumbing department for thermoform plastic. There is a cement there that allows you to join= pvc to abs, and cpvc. I found that it does chemically react with the theroform to bond it. If you could find some other thin pvc sheets they may allow you to reinforce the patch. Look for parts that have a thin flange that you can cut the material off of - possibly even shower panels or something. Test it with the solvent glue first to make sure the patch disolves a little first. Your best patches will chemically bond, not something like a glue or epoxy that has a physical bond.
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12-12-2012, 07:58 AM
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#11
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Rivet Master
Airstream Dealer
Corona
, California
Join Date: Feb 2002
Posts: 16,497
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Quote:
Originally Posted by robwok
Just my 2 cents: I have a 64. The refer scoop is almost certainly made of fiberglass. Same as the end caps though the inside part of the endcap cabinet is thermoform. The wheel wells are theromoform plastic, probably.
For the scoop, I would suggest a fiberglass kit. They have small ones at Lowes and HD now. The resin should help glue yours back together (mine is cracked at the rivets as well, but haven't wanted to take it down yet). For the wheel wells, I had great luck with the multi -cement in plumbing department for thermoform plastic. There is a cement there that allows you to join= pvc to abs, and cpvc. I found that it does chemically react with the theroform to bond it. If you could find some other thin pvc sheets they may allow you to reinforce the patch. Look for parts that have a thin flange that you can cut the material off of - possibly even shower panels or something. Test it with the solvent glue first to make sure the patch disolves a little first. Your best patches will chemically bond, not something like a glue or epoxy that has a physical bond.
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Unortunately, Airstream never made the scoops out of fiberglass.
They did use a plastic that becomes very brittle in time.
Andy
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12-12-2012, 12:53 PM
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#12
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3 Rivet Member
1969 23' Safari
Athens
, Georgia
Join Date: Sep 2010
Posts: 128
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Quote:
Originally Posted by AWCHIEF
Instead of repairing, how about using the old ones as molds and making new ones using fiberglass cloth and epoxy resin. It is actually a really simple process plus will learn a new skill that might come in handy sometime in the future.
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That is actually a very interesting idea. I'm looking into the products that I would need. Thanks!
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12-12-2012, 12:56 PM
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#13
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3 Rivet Member
1969 23' Safari
Athens
, Georgia
Join Date: Sep 2010
Posts: 128
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Quote:
Originally Posted by 68 TWind
I fixed the refrig.vent (and lots of other plastic parts) on my 68 TW with West System epoxy and fiberglass cloth. The epoxy resin is used by boat builders and composite airplane builders. It will do a better job on plastics than polyester resin, (more flexible and adheres better). You can get the West Epoxy at any marine supply or aircraft supply company. It will be a lot cheaper than buying and shipping on a new one.
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Thanks for the info. I will probably repair using this method, or use my existing scoop to mold a new one. Is there any trick to mixing the resin and the hardener?
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12-12-2012, 01:06 PM
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#14
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Rivet Master
Commercial Member
1957 30' Sovereign of the Road
1959 28' Ambassador
1949 24' Limited
Peru
, New York
Join Date: Sep 2004
Posts: 745
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Quote:
Originally Posted by Roadrunner
Andy are the refer scoops still available for the older vintage Airstreams? It is my understanding they are not? Thanks!
Bob
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Vintage Trailer Supply has them.
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12-12-2012, 01:14 PM
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#15
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3 Rivet Member
1969 23' Safari
Athens
, Georgia
Join Date: Sep 2010
Posts: 128
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Just found a fiberglass tape product. Anyone have experience with that? I'm supposing that I could put the tape around the edges of the scoop, seal the tape with epoxy resin, sand and paint. It come in various widths, from 2 to 6 " or so.
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12-12-2012, 01:22 PM
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#16
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Rivet Master
Airstream Dealer
Corona
, California
Join Date: Feb 2002
Posts: 16,497
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Quote:
Originally Posted by Colin H
Vintage Trailer Supply has them.
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Do you have a link to that part?
Andy
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12-12-2012, 01:54 PM
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#17
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Rivet Master
2006 23' Safari SE
Biloxi
, Mississippi
Join Date: Nov 2011
Posts: 8,278
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Quote:
Originally Posted by sarasafari
Thanks for the info. I will probably repair using this method, or use my existing scoop to mold a new one. Is there any trick to mixing the resin and the hardener?
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Read very carefully the directions that come with whatever brand you buy. It is critical to get the mix just right or you might just end up with a big goopy mess or a very hot solid lump in your cup. Don't do it by eye, use mixing cups or some similar device to get consistent drying and hardness times. I use West System resins/hardeners and the pumps that they supply. The pumps give the exact mix ratio each and every batch.
I use glass tape all the time for repairs. Don't go too heavy on the thickness of the tape or the resin. Thiner is better for molding to curves and odd ball shapes.
__________________
MICHAEL
Do you know what a learning experience is? A learning experience is one of those things that says "You know that thing that you just did? Don't do that."
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12-12-2012, 03:55 PM
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#18
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3 Rivet Member
1969 23' Safari
Athens
, Georgia
Join Date: Sep 2010
Posts: 128
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Quote:
Originally Posted by Inland RV Center, In
Do you have a link to that part?
Andy
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I'll bet he's looking at the vent. Andy, I'll keep your part in mind if my fix doesn't work. My scoop is not in terrible condition, so I'm going to try a repair first. Thanks!
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12-12-2012, 04:02 PM
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#19
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Rivet Master
Airstream Dealer
Corona
, California
Join Date: Feb 2002
Posts: 16,497
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Quote:
Originally Posted by sarasafari
I'll bet he's looking at the vent. Andy, I'll keep your part in mind if my fix doesn't work. My scoop is not in terrible condition, so I'm going to try a repair first. Thanks!
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A word or so to help you.
Patching, won't last very long, as the plastic will continue to crumble.
You can try coating both sides completely, so that the old plastic is totally covered with the fiberglass.
For your last coat on the vent surface that you will be looking at, you perhaps should also consider a final coat of "gelcoat" with the colonial white (ivory) color.
All you can do, is give it a shot.
Andy
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12-12-2012, 04:27 PM
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#20
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3 Rivet Member
1969 23' Safari
Athens
, Georgia
Join Date: Sep 2010
Posts: 128
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Andy, good point about that plastic-it's so brittle. Really appreciate your advice
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