Once again, I seem to be in the minority of the complainers here. I've been playing with Revo shafts for 4 years now...daily. I have NEVER had any of these so-called black marks. I've cleaned my shafts with the Revo cleaning cloths perhaps as many as 10x in 4 years...each time with almost no residue, which is always just dirt, not black marks as described in this thread.
Scott Lee
http://poolknowledge.com
Scott Lee
http://poolknowledge.com