I hear WD40 will remove spray paint from cars...
I have two Warthogs and both get used a lot, the one on my machine is getting prolly +15 hours a week since November 2010. No issues, except a very slight twang from the center spring on my stick that I sometimes notice. Maybe I should grease it... but it would be a big deal to disassemble my flight deck... Next week I should pick up my Procrastinator's Club card - I'll grease it right after that.
If you are flying the A-10C then the Warthog is the stick to have.