Me too! I was thinking of doing something similar to ours, but haven't found the right light yet. You may have just solved that problem!

I think that to paint the tips, you should either sandblast or sand the chrome to help the primer/paint stick to it and also make Absolutely sure there isn't any grease or oils on it. That will cause fish eyes and need to be stripped and redone.

Your X5 looks Really Good PolePosition!