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Post by Deleted on Nov 12, 2009 14:13:52 GMT -5
Does anyone have any good Ideas/ techniques on how to remove factory undercoatings? Particularly under the wheel wells. A heat gun sounds good but there must be another way.
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Post by BR[] on Nov 12, 2009 14:35:42 GMT -5
Use an acetylene torch..............just stay back and keep it moving back and forth......... then wire brush it off.
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Post by RAM Z on Nov 12, 2009 14:43:53 GMT -5
How brittle is it?. Mine was so brittle I used a scraper and a wire wheel and it flew off in chunks.
Paint stripper will soften it too. But it makes a huge mess.
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Post by slowolds on Nov 12, 2009 16:57:08 GMT -5
I have tried heat and stripper. slow and messy. I preferred a wire wheel in an angle grinder. It seemed to cut right through, not clog and left a clean surface. I would cover your arms and face. When it comes off it is molten and will burn you. you also have to be aware that as the wheel wears down little steel projectiles fly!  |
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Post by Deleted on Nov 12, 2009 18:49:44 GMT -5
All of these methods sound good. I have been burnt before from hot molten under coat and I t Sucks. I think if your suited up properly though you can limit your flesh wounds. One time a friend of mine was helping me on my 65, "he was welding a trunk pan in for me" and, as I went to reach for something under the trunk "like an idiot", a big piece of it fell onto my fingers. Yeowww!! It was Fricken Hot S!*#! Anyway, the idea of a wire wheel with a angle grinder sounds good.
Thanks all..
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Post by nickthefish on Nov 12, 2009 22:16:49 GMT -5
All of these methods sound good. I have been burnt before from hot molten under coat and I t Sucks. I think if your suited up properly though you can limit your flesh wounds. One time a friend of mine was helping me on my 65, "he was welding a trunk pan in for me" and, as I went to reach for something under the trunk "like an idiot", a big piece of it fell onto my fingers. Yeowww!! It was Fricken Hot S!*#! Anyway, the idea of a wire wheel with a angle grinder sounds good. Thanks all.. That fricking hurts!! I was laying under my Mustang welding and a molten piece of weld fell down my sleeve and burned into my wrist. Burning flesh does NOT smell good. The torch and a scraper is by far the easiest method of removal. Nick |
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Post by oldsproject on Nov 12, 2009 23:28:43 GMT -5
I used to do a lot of overhead welding and ain't nothing until you get some slag burning on the boys if ya know what I mean  |
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Post by Deleted on Nov 13, 2009 10:35:29 GMT -5
Lol...I mean, that's not funny at all Brian. Yeowww!!!
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Post by popzoldz on Nov 13, 2009 15:40:36 GMT -5
OK - I'll go against the school of thought just for discussion purposes. Heat is probably the answer for wheel wells but for flat areas like floorpans, dry ice is the trick. Lay it on the inside floor, cover it with something insulating and twenty minutes later it just chips off. Just bump the underside and watch it fall off in chunks. A quick sweep up and it's gone. If you have an old can of brake fluid (pre synthetic), brush that on the fenderwells and it causes the softening too.
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Post by Deleted on Nov 14, 2009 9:31:50 GMT -5
The wire wheel shown in the other post is the best way to get the old undercoat off. It is best if the piece you are working on is a little on the cold side(outside overnight) then the stuff just flies right off. I did this and then used a small sandblaster to finish getting the paint off so you could get everything down to bare metal. Worked good on two cars so far.
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Post by Deleted on Nov 14, 2009 12:26:09 GMT -5
Dry Ice....on the flat areas....who would have thought? I like it.
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