On heavy stuff you can use the medium grit. For sheet metal, the fine garnet would be more appropriate. You can't really hurt metal that's 1/8" or more thickness, but too aggressive media can warp sheet metal pretty quickly.


Kevin
1951 Chevy 3100 work truck
Follow this saga in Project Journal
Photos
1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.