Shrinking Discs
Posted by hudson
Andrew McNally Professional Moderator Join Date: 01/08/2006 Posts: 1,217 |
My Shrinking Discs arrived today.. they're stainless discs with a turned lip that you slap on a grinder and heat the contact (high) spots up on whatever banged up panel youv'e got and then spray with soapy water to shrink them down.
They claim you can get it good enough that you don't need bondo at all.. I'll report back if anyone is interested.. I know it's not terribly rally related  Andrew M Onterrible 30ish |
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Jon Burke Wrote:
------------------------------------------------------- > ok, I get it....heat metal...cool it...it > shrinks. You got it! 
> why wouldn't you just use an open flame instead? > propane torch or something. I think that's where the idea came from, as I've seen that technique before and it's more spontaneous in that it doesn't use a specific tool for the job. The problem with using a torch however, is that you can't target the highs.. you heat a spot. The disc creates heat only on the raised portions. I'm having amazing luck for someone who's got next to no body experience taking out a million dents in the roof of this one NSU. Not only are the dents coming out slowly but surely, but I've noticed a considerable increase in strength of the roof panel in the areas that have been mostly dedented (think hail storm). My worry was that the roof skin was oil canning pretty bad (springy).. and simply slapping bondo over the hail dents wasn't going to be satisfactory. Andrew M Onterrible 30ish |
Andrew McNally Professional Moderator Join Date: 01/08/2006 Posts: 1,217 |
At least whenever I use a propane torch on sheet metal I get lots of rust.. apparently it's from too much oxygen.. at any rate once bitten
Andrew M Onterrible 30ish |
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