How to Remove Pit Marks in my 68 Tail Panel

I sanded mine starting 100 and worked my way up to 1000. Then buffed to a good gloss. I used a Makita electric palm sander which leaves oscillating sanding marks which polish out easier than straight sanding marks.
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Great idea, I have a palm sander I think I’ll try that method. What did you use to buff it? Thanks for the info