The only chrome paint that works is something called "KILLER CHROME" or "mirra chrome" from alsa corp . All of the other stuff will give you a metallic grey that simply sucks.

What you can do with the metallic parts is sand them and then polish them back, with the fork maybe you can do the same. The other option is chrome the fork at home with some chroming kit because send that fork to be re chromed will be more than 3 times what the bike's worth.

If you want to paint over the chrome, u have to sand it, apply some etching primer, sand... then regular primer, paint, then clear... sand and polish.

Good luck