Rubbing alcohol should be pretty well tolerated by the paint, but I don't know how well it will take off the crayon.
I think the earlier post about tar remover referred to one or another of the clear-solution organic solvent products that are out there. I've used them on smallish spots for tar, and they work pretty well; haven't had problems with paint but I always try to minimize the exposure, and then rewax of course. Might be fairly effective on crayon; don't know if it would work better than the cleaner-wax idea.

__________________
Craig Bethune

'97 SL500, 40th anniversary edition

'04 Olds Bravada (SWMBO's)
'06 Lexus ES330
'89 560SL (sold)


SL--Anything else is just a Mercedes.
(Kudos to whoever said it first)