Anozized paint works good!
But back to the real mods
Install grease fitting to axel carrier
(Pretty easy get a small grease fitting from auto store, hardware, wherever, center punch a hole in the center of the top half of the carrrier, drill it out. Now comes the work! Get to the axel collar, after you've taken your whole axel apart that shouldn't take long . Then line up the grease fitting hole with the collar and drill 2-3 holes, depending on drill bit size, don't get carried away. This keeps the axle well lubricated.