I'm doing some panel replacement. I'm tacking in the panels with multiple tack welds. What is a good way to knock down the welds. I'm using a 50 grit sand disc which works prety well. Wondering if there is a better way. Thinking about the use of a die grinder to run over the high spots. May I have some advice please. Thanx.

1957 3805 Panel
It's not how you fall down, but how you get back up.