So yeah, I dun goofed. I got some bad advice and thought I only needed 120grit sanding before painting with a rustoleum 2x paint/primer in one. Two coats in, and I can still see the scratches. I've found guides here/google on how to remove all paint for a new paint job, but this is a black base/primer coat so I'm hoping there's flexibility.
What's my best option for correcting? Can I just re-sand the crap parts with ~200/300/400 or do I need to completely strip and try again? Does it need to be sanded by hand, or can I use a dremel to start?