Cranks skip when braking and starting

after spending the whole of yesterday beating the fuck out of an an old mavic ma2 rim to get it back into shape. I have come to the conclusion that all bike parts are not as fragile as they look. And so forth, I shall never handle bicycle componentry "tenderly" ever again.

Your call I guess, rotafix properly or spend a whole day 'bashing' things back to nearly as good as they where before you started.