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Old 04-17-2008, 09:44 AM   #15
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Quote:
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the aluminum skin of an airstream is too soft for any sort of media blasting. You will end up with a dull gray finish that's nearly impossible to polish out.
I would certainly find or buy a piece of aluminum with the same softness as the A/S, and give it a trial run before trying it out on my trailer...
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Old 04-17-2008, 01:27 PM   #16
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I will keep you posted. The opinions run the gamut on this.
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Old 04-17-2008, 03:57 PM   #17
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I've seen a vintage trailer that was blasted with walnut shells...it looked very nice! It had a bit of a matte texture, but it wasn't at all objectionable. I actually thought it was a nice alternative to polishing or re-clearcoating.

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Old 04-17-2008, 05:16 PM   #18
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I have heard good things about this method, and since I am doing the stripe area only and the small mid molding it seems like a good idea.
Tried it today, no media came out of the gun, just air. Not sure why, I will talk to the tech guy tomorrow. Disappointed but going slow on this.
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Old 04-17-2008, 05:23 PM   #19
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Tried it today, no media came out of the gun, just air. Not sure why, I will talk to the tech guy tomorrow.
Hopefully it's something simple like a valve or switch that needs to be flipped.

Could it be that the nozzle orifice was smaller than the media?

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Old 04-18-2008, 06:48 AM   #20
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My thought, although I looked in there, and checked for blockage and it seems to be the right size. I did manage to shoot one or two pieces into my hand though. Felt just great
Being new to this process, I am hopeful its something simple that this dunderhead can't see!
I am talking tio the tech guy this morning. Of course it will rain tomorrow so I am off trying again until maybe Sunday.
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Old 04-19-2008, 02:25 PM   #21
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I took the gun and shells back this morning, got smaller shells - 24 grit, and another gun. Got home, set up and blasted about an inch of paint off, nicely down to shiny metal.
Then the thing crapped out and would not shoot again.
Took it back again and got my $ back. They took the shells and all back.
Looks like with much higher level equipment this would do a nice job.
Back to the stripper for me. Oh well.....
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Old 04-19-2008, 04:12 PM   #22
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CO2 Blasting

I was in the aviation industry for many years and we were beginning to experiment with CO2 blasting. This is a process where soft CO2 beads are used instead of sand, plastic or walnuts. The premise behind the process is the thermal shock to the surface and the kinetic energy of the beads hitting the surface. There is no noticeable abrasion and on several occasions the thermal shock would remove small surface dings and hail damage on aluminum surfaces. We were fortunate to have several companies in our area that provided the service at a minimal charge. The great advantage is hardly any clean up. the CO2 beads sublimate and leave no trace. I have talked to several people in the food industry who have successfully used this method along with a waste disposal company that needed a quick non abrasive method to clean hydraulic cylinder rods. There are several web sites with further info.
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Old 04-20-2008, 12:30 PM   #23
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I have seen that done, also Baking Soda is useful on some surfaces. I went to the method my Industrial Arts Professor brother suggested. Its working well.
I put the stripper on , let it sit an hour then pressure washed it off with a strong stream. No leaks, and the paint came off well. still a lot to do, but its moving along now.
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Old 10-21-2011, 12:25 PM   #24
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Can you tell me more about using Baking Soda to strip the clear coat?

Bill
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