I hope you are not soaking Carbon shafts in the Ajax (that's what the "shaft prep" from Bohning is). Aluminums are fine, but it will mess up a carbon shaft if you let em soak in that stuff, and it could be causing your problem if that's the case.

I tried that shaft prep years ago on ACC's and all it did was screw them up..I couldn't get anything to stick to them, and it caused the carbon to separate.

JeffB