Next, take some automotive tape, and mask off any rubber seals (if you left the windows in) or any other areas you dont want to paint (doorhandles etc)
To prepare my paint, I poured about a fist-sized amount of paint in a paint tray. I added approximately the same amount of mineral spirits to the paint tray and stirred it up. The consistency of the paint should go from very thick to about like watery milk. This will help the paint to level out and also it will go a little farther in surface area.