I have an 04 Giant TCR C2 that I'm removing the yellow and silver graphics from. The bike will remain nude carbon with the white lettering. I have Ultegra SL brake calipers and derailleurs, but I still have the silver 6500 cranks. Is is a better idea to paint the the crank arm and spider black or just replace the silver chainrings with black ones? How does paint hold up on the crank arms?