[Justin@Athens]

I agree with david's approach. Superglue the faces of the nick together, and then as jflex suggested, RTV over the surface. I think this makes sense give these small nicks won't manifest into large holes anytime soon. CV books need replacement every couple years it seems...these aren't there yet.

If you had larger holes in them already you'd want to replace the boots and remove the old grease and debris--but that is not warranted here.