[jimmythompson1964]

Originally Posted by Johnny_Lamebridge

I found out that they're "3M Roloc Bristle Discs".

Here's a demo: https://www.youtube.com/watch?v=ufVo93qLEqQ

My buddy gave me some to try. I would imagine they're available wherever body shop supplies are sold.

I wish I would have read this about 3 weeks ago...good information...never to old to learn a new trick.