I was tempted by stickers like this 
What should I mark my stuff with at tournaments?
Skunk Spray. No one will take ANYTHING and it will distract for that key advantage!
Key is light spray not to heavy.... and blame the other guy.
Why go to the bother of marking stuff? Simply pick your nose in front of your opponent before the start of the game, look at your finger and ask him/her if they want to see, before putting (a DIFFERENT) finger in mouth.
Nobody will want to touch your stuff after that, trust me.
Cheers
Baaa
What about dice guys? I know it says now you can marker them, but ... ugh, im not sure I'm ready to.
How about repainting the symbols with a fine brush? Wouldn't know what color to use, though. Black probably won't look good.