My regimen for oxidized fiberglass is to wet sand with dual-action polisher, polish with 3M Finesse-It, then wax and buff. I use a Harbor Freight 6" DA polisher ($60), and have a 5" hook and loop pad. Use 5" 400, 1000, and 2000 grit hook and loop discs. Use a spray bottle with water and a little Dawn to keep the area wet while sanding. I use the DA polisher 6" foam pad to apply the Finesse-It, then buff it off with microfiber towels. I finish up with Collinite wax applied and buffed out with microfiber towels by hand. I prefer to wax and buff by hand because it leaves more wax on the surface than would a power buffing polisher.
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