Hello, i am having trouble mastering the most elementary of body filling tasks, that of filling the sinker marks on the trunk lid. The photo is of a '64 Pontiac Bonneville convertible, with the sinker marks circled. I used bondo over a thin guide coat of lacquer primer, sanded it to what i thought was smooth (didn't feel anything when running my finger over them), then hit it again a couple of times with the primer, sanded that with 600 and 1000, then shot the lacquer color. i could have sworn that i'd filled the sinker marks correctly but obviously i didn't. the bondo looks like it's too low.
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any suggestions on how to do this properly? thanks very much.