Originally Posted by sk8erjosh09
You would want to start with 320 and work more towards something fine like 1000-1200 right?
It all depends on how rough the starting surface is and how good you want it to look. For most parts intended to be finished and painted, a 320 grit SP will marr the surface terribly and require you to do much more work. I would start with at least a 600 and work to a 3K, but again, it depends on how good the original finish is....