Thanks for the replies,fellas.
KB,I would prefer to have plain ally,but the state of my bevel drive where the paint's fell off has convinced me that I'll have to paint it.
I've had experience of what blasting can do to engine internals even after cleaning thoroughly-cost me a Golden Flash motor.
Soren, thanks for the link,I'd tried a search but couldn't find much other than peeling paint.
Paint stripper it is then,and several coats of rich lustrous black.
Or maybe silver.
Hmmmm,Eastwood do a nice Chevy orange.............