If the runs are just in the clear it should be no problem. The base coat should have been fixed befor clearing. I have used a razor blade VERY VERY CAREFULLY to get most of the run. Then used 400 grit with the tip of my finger to sand out the rest of the high spot. Then use 800,1500 on the whole area and buff off. I kindof do things how they make sense to me though as I am not a body pro. Someone else may have a better way.