Buffing polishing advise needed

That's the problem with single stage metallic, what you se is what you get, nothing you can really do about it. I only spray metallic with base/clear, the only problem with that is sanding through your clear is an even bigger disaster. The car looks good, start with your trunk lid or something that is small enough to fix more easily while you're getting a feel for it. Good luck, it should go well. Make sure you sand it every bit as much with each finer grit or you'l see that haze I was talking about and have to go back. You can go as fine as 2500 grit or even 3000 if you can get it. The finer you go the easier the buffing goes.