When crank arms bottom out chain line becomes an issue. Crank arms bottoming out are a sign the crank arms have been overtightened, deforming the crank. The axle end should be ~1/8" from the end of the taper hole on a properly tightened and torqued crank. If they are even with the end, you will have ~3-4mm chainline displacement, and you will also have a higher probability of the cranks loosening on a ride. FWIW. (It doesn't matter whether the crank bolt is painted or not.:)
Donald F. Dunstan
> Marcus asked:
> >So today's worry is that the Campy SR cranks are bottoming out on the
> >spindle. The crank arms are tight, but I am not loving the chain line.
> >Are my cranks toast? The spindle is a Campy steel. I can't remember the
> >numbers on it, and it took awhile to get the BB adjusted right, so I would
> >prefer not to take it apart again if I can help it. I know, I should have
> >written it down when I had the chance, but here we are.
> Measure the chainline as per
> <http://www.sheldonbrown.com/chainline/index.html>. It should be
> 41mm from the center of the downtube to the center of the small ring,
> and 46mm from the center of the downtube to the center of the big
> ring. You might of reversed the axle.
> Roy "don't ask me how I know about reversed axles" Drinkwater
> Lititz, PA