In my experience no paint sticks all that well to chrome (thus the reason why you are repairing the chips) but you are fortunate that it's an easy color to match. On the other hand, paint seems to stick well enough until the next time.
It is best to read the instructions on the can for what to use when cleaning up.
Regarding the bb question, many people like them (including Sheldon) so I'm really on thin ice by saying this, but personally, I dislike those accordion thingies.
Every time I remove one it seems there is a lot of dirt and grit accumulating at the ends, exactly where I don't want it.
- Instead of reinstalling it, I make sure that the seat post is closed (with a cork if need be) to keep additional foreign matter from entering, and I place a little extra grease at the bottom of the bb shell to trap those stray particles away from the bearings.