[wyomingclimber]

I'm trying to smooth out the primer on the back corners of my truck and am having some trouble.

I feel like using a sanding block is going to create flat spots that will show up after I topcoat (black, no less.) I tried to use a flexible block, but as the curve changed, it caused wrinkles in the sandpaper that cut grooves in the primer.

Are there some techniques/tools I'm missing here?

Thanks