have a 20 year old holley 4160 carb off the boat. the florida humidity has taken it's toll and the linkages on it are rusty and the body itself has that white powdery stuff on it. I just got done tanking everything and have it clean, but the body and especially the throat still have a lot of white oxidation that isn't easy to scrape off. for the most part i can't reach in there to scrape or sand. looking for ideas how to get that off, and also how to recoat it. for the outside of the body, the airhorn and choke plate and stuff i was thinking of hitting it with self etch primer. not sure what to do about the throats, i don't want to paint in there and end up covering fuel slots and stuff.