Has anyone tried "Black Tire Paint". I looked at it a few months ago but since you had to buy a whole gallon I never got it. You just paint the stuff on the tires. It is water based and suppose to really dress up old tires - even covering up the hairline cracks in the sidewalls.
http://www.ytmag.com/articles/artint71.htm
http://www.ytmag.com/articles/artint71.htm