I'm in the process of giving my guitar the final go-over, wet sanding, polishing, etc. First off the root of the problem is that I level sanded with p220 grit paper. It leveled nicely but I'm having a hard time getting rid of those scratches. I've gone back with 400, 600, 1000 wet/dry (used dry) then on to polishes but the 220 scratches remain. Then tried using a spray of water with the 400. Still 220 scratches. Both sanding rounds made little bits of finish build up on them which made marks as they were dragged accross while sanding. I stopped after maybe 10 seconds of sanding to scrape them off but they quickly came back. I then consulted Erlewine's finishing book. He suggests soaking the paper in water overnight to reduce the 'corns' on the paper. Did that, still loading up. The finish is maybe a month old, nitro lacquer. Any thoughts?