need help with painting

hey guys
i have a question i am going to start painting my yoyo(airbrush) my yomega maverick (metal) and after i paint it what do i put on to protect it?

First thing you should do is use a primer before you paint that will protect the paint from chipping more than a clear coat ever could. I suggest auto body primer as aluminum is a tricky metal to stick to.

For a top coat make sure you use a lacquer or an acrylic in your preferred sheen.