Dupli color has one too, I have used both. They work well as long as you prep right. They say to scuff the areas and clean ..... well I found the best thing you can do is scuff it with 80 grit or 60 grit and then clean everything as they say. I usually put an 1/8 inch or 3.175mm thick on the sides and the bed and tail gate get a 1/4 inch or 6.35mm thick. It takes a lot like 2 to three gal.'s for a full size long box truck. But you can return any full cans you don't use, just nice to have it there and ready if you need it.
Dupli color has a spray gun that you can buy and it sprays right from the gal. cans, works good I have one. They also have it in small spray cans too. | 
