How to Remove Pit Marks in my 68 Tail Panel

Hello Everyone
I’m attempting to restore my 68 GTS Tail Panel. Overall it’s in great condition. I have some pit marks at either end of the panel. You can’t feel them with your finger but you can see them. Is it better to file them out or sand them out? I’m definitely a rookie at this. Thanks for your input and guidance.
Stu.

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