aluminum grille needing repair

[dave's70]

I have a 70 grille with some small dents here and there and has some scratches on it.
I was wondering if you can use body filler or somthing along those lines to clean it up so it can be painted. It's an extra grille so if I screw it up it won't matter that much, I just don't want to spend a bunch of time on somthing that won't work.
Thanks for the help.

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70 C-10 350 with weind intake,eldelbrock carb,HEI,305 heads,and a mild cam