I used a 3 step system for rust seal paint (found at jegs)
my goal is to just have it black, I didn't care if it was smooth, so I only used a quick wirebrush on it.
before restro
Step 1: degreasing Step 2: rust/etch treatment
Step 3 Completed: Rust Seal paint
My new cover will be installed when my gears are done, painting the drums is just to look ok until the disk/5lug conversion next spring.