i did mine in work the other day. i work in a bodyshop and we use schultz. you can paint it on but for a better finish its sprayed on with a special gun. i took off all plastic shields first so all the metalwork is exposed then blew off all moisture and dirt. a final rough mask up of things you dont want to get it on like suspension components, exhaust etc and give it 2 coats of the stuff, waiting 30mins between each coat. your car will smell of the stuff for about a week or so though lol.