I have been working on a set of paint hardened garage doors for over 20 years. Each of these discs was able to eat through about five sections (6 inch boards) on one of my two garage doors before wearing out. The whole set didn't go through a full door. I would use them again as other things I've tried to remove the paint with resulted in damage to the wood underneath the paint. Still, if I had to do it again, I'd stock up on it and give it a try. In the end, I think the results would have been better.
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