Another thing that works good for holding nuts and screws in a socket/bit driver is butyl. We used that a lot in the body shop.

I have a question for all you that could make a good tip for everyone. How, or what is, a good practice to put painted bolts back together without scratching everything all up. Just putting a socket on a bolt head seems to do it. I had to repaint some sheet metal on a H Farmall and I tried like crazy to not scratch anything putting it together. The bolts still had some chip marks and scuffs so I touched them up. Have any good tips for that stuff?