I’ve restored 5 sets of headlights so far. The first pair came out perfect, but all the other ones I got clear but left faint scratch marks. I’ve been using the old Stay Clear method: Liquid magic- 1-2-3k- wipe on clear coat. I generally sand in only one direction because I think that’s what Andrew Tucker does. Anyone got advice for me? Is it even avoidable? If you look closely you can see the scratch marks in the picture.