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Old 11-13-2005, 08:45 PM
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crashtech crashtech is offline
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In my opinion it's because the fine grits used don't actually straighten panels well, and a run is a fairly large imperfection. If you sanded it with 80 grit it would be gone, but then again so would the clear. On the occasional run, I have better luck doing a kind of shaving action with a razor which has had its corners sanded off. It's a tricky technique though, and I don't know if I could explain it. The razor is kept at nearly 90 degrees to the painted surface and scraped over the run, being extra careful not to gouge the surrounding surface. Once most of the run is removed this way, you can color sand and buff normally. This technique can work very well, but I have gouged up a panel or two learning how. A big part of the trick is not to forget to dull the corners of the blade.
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