Have you considered wrapping it? https://www.metrorestyling.com/3M-Gloss-Flame-Red-p/3m-2080-g53.htmOn a similar note. I would like to lightly buff out some scratches on my Savvy Tailgate Armor. What products and method would I use to do this?
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It doesn't seem like it would be a hard DYI project.
To answer your question though... https://www.wikihow.com/Polish-Scratches-Out-of-Aluminum