Currently at $3,200 on eBay, the custom-built Power-Up Prime transformer is basically “formed by combining Leader Class Optimus Prime and Leader Class Jetfire — real chrome paint on front grill, bumper, exhausts, rims and other areas.” Auction page. Click here for first picture in gallery.
I use special plastic bonding primer, then base coat with high strength lacquers and finally detail with enamel. (Keep in mind, this is a collectible, so don’t throw it around!).