I just recently restored my factory clear Targa top. I used Emery wet dry paper. Started with hand sanding using 220 to get the coating off then 400, 800, 1000, 2000. Always sand in opposite direction its easier to see when you get the previous sanding scratches out. Then 3000 grit on an orbital sander. Then I used headlight compound with a compound pad on my polisher, then finished it with Maguiar's polish. I started sanding before I thought to take a before and after. The worst part was the left side where I already sanded. Anyway I was ready to throw it out now all I need is a protective layer against UV and I'm good to go. Any thoughts on a good protector?