Originally Posted by
JoePoonani
Why does one spray their head gasket with copper spray?
Or to reuse an old one like I did.

h:
Just wait half an hour between coatings, do about three or four until you have a good surface built up, and then let it dry overnight. It will still be sticky in the morning.
Oh, and a word of advice, don't do it near anything that you don't want millions of little copper flakes everywhere. If your car is anywhere nearby, you will have fun getting all the specs out of your paint and off your windows.