Since it looks like I can even give it a new coat of paint,
I don't have any experience of this, but i would assume as long as the new coat doesn't have a different level of reflectivity, that should be fine.
Main reason not to do it is that it's harder to aim at the Clarke belt than a single satellite, especially given how poorly-marked most dish and motor brackets are.
I may have been lucky, or perhaps my dreambox is very forgiving to weak satellite signals, but i was able to get my motorised kit up and running inside a couple of hours . Really all the magic is done in the box thanks to USALS and providing you can get a good lock on one of the major satellites, and your dish is mounted true, the rest should ...hopefully... fall in place.
Anyway good luck Mark, there is a lot of info to trawl through on the subject, but i think it is a rewarding hobby.