Typically 80 grit would be the ticket for paint and rust work. A slower turning, bigger surface grinder/pad combination would work better. The small angle grinders can get too agressive and create a lot of heat and remove too much material unless you watch really close.
Kevin Tetz at
www.paintucation.com has an excellent video on metal prep and rust repair that you might want to consider purchasing. All of his videos are excellent info.
Bruce Palmer
[email protected]
