Anyone have tips for those of us who started with (ugh) 80 or even (lord forbid) 60 grit sandpaper? Would an epoxy primer fill these or should I just go out and get a new hood and trunk? That's where most of the scratches are. Now that I have an hvlp gun, I can do a decent paintjob in two days. I just started buffing and I can now see all of the scratches from being a bit over-eager with my sandpaper.