I don't think it would work too well on paint.... you want something big and flat (lots of smooth surface area) on paint... I use the random orbital on paint. I'm pretty sure the powerball is just for getting into crevices, etc. on wheels???
Ahhh, just looked at the Mother's site... didn't know they made the yellow one. I've always wanted to get the mini to use on the wheels. Let us know how it works.