I have a Salsa Vaya with VO hammered fenders on it and stock tires, and there is a little bit of rub on the rear tire all the time the tire spins. Even my bike shop's service tech didn't quite fix it, though he helped. I don't want to keep playing that game.

Thus, I will probably tackle this myself. Is there a systematic way to approach this, rather than just making hopeful adjustments? Since fenders tend to move all over when you pull on one part, I know it can be dangerous to tinker.

I know this could seem like a stupid question to some, but I'm ready to take the abuse and hopefully some helpful advice... Thanks!