You can go to your local auto paint supply store and check if they have some "overspray clay". YOu can use a spray-on lubricant or spray detailer along with the clay to get the overspray off. Here is one brand of clay
No buffing involved which means you don't have to worry about swirls.
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The stuff is great but remember it's rubbing paint,I can't tell you the amount of times I've seen someone drop the clay bar and just refold it and keep going.Protect it like your gonads or it's history.
Just a quick question for you guys.
If the clay bar gets dirty is there a way to clean it?
Or how do you tell if you should not use the clay bar anymore by feel or what?
Honestly I've only used one once,I pawn it off on the detail boys.I really don't know if you can clean it other than shaving the dirty section off with a knife.