I'm new to guitar finishing works, so please bare with me. I did some retouching on this guitar where the black paint was badly scratched, then applied a clear nitro coating over the area. It looked OK at that point, apart from the obvious level difference of the new coat. Wet-sanded the area down with 400, 600, 800 and 1200 grit, then buffed and polished by hand. The result is frustrating. My questions to you guys: a couple of areas now show a kind of blur, like a difference in brightness. It won't go away with polishing, so I take it it lies deep below the nitro coat. Could it be a different kind of finishing there? Or something to do with humidity? And what about the fine ring shaped scratches that still show after polishing, is it possible to get rid of those? Thanks a lot for any insights!