Yea, sanding and buffing will get them like new. I took a heat gun after sanding it too which helped.
I noticed some gouges after I shaved my front fenders, so I used some of the leftover scrap fender material, and heated it up to where it was hot and goopy then filled in the gouges putting the plastic on the edge of a razor blade, then leveled it off by sweeping the razor blade over the gouge. From there just sand, heat gun,and buff. I actually noticed I need to do it again after cleaning the Blaster the other day. It needs it.