as far as that starter goes I don't think I would follow dan's advice, sure he is very very knowledgable but IMO what it really comes down to is looks,
I would paint the starter motor housing and leave the aluminum part as is or slightly polish it to take the glass bead look out then clear coat it to make sure it doesn't corrode, or go with a nos one if you wish but it looks great to me IMO
thats my 2 cents!