Any success painting M50 valve covers?

[HakenTT]

Do you wonder why the silver paint chips away on OBD1 M50 valve covers? Because its magnesium alloy!

galvanic corrosion has been one of the major obstacles to the growth of structural applications of magnesium alloys

Any of you guys painted M50 valve covers with success and paint is not chipping away?

[bimmerteck]

Every magnesium valve cover/wheel I've seen painted eventually flakes, I'm hoping my powder coated valve cover lasts a little longer.