Has anyone tried these things?They have the red ones for wheels and metal trim and the yellow one for paint.Anyone with experience using either?What is good to coat them with for polishing?

I use the red one on the wheels and it did a great job, but only because they didnt have the yellow one around me. I would use the yellow one on wheels, with a good cleaner polish like Meguiars #83. Make sure to wax after.

We should use the one suitable for paint(yellow) on our wheels because of the clear coat

I wouldnt use them on the paint.

I use the red one on my exhaust tips wheels, and light housings . Works GREAT!