Little spots like that are fine as 180.Ok, it has been about 3 months and finally able to get back to my car. I had primed it with epoxy and have sanded the whole car with 180 . My question is during the sanding I did get back to metal in places. They are along the body lines and some spots the size of a quarter. Do I scuff those bare spots with 80 grit before apply more epoxy?