WWII OD Green (monstaliner). 2 gallons - wish I'd had about a quart more for touchups.
edit: To add to what Jose said:
-If I had to do it again I'd get several paint pans as well as tons more rollers. It sets up around the edges of the pan and you end up with goobers
-If you're rolling the whole thing, have at least one person to assist. 2 assistants would be better. More than that I think you'd be getting in each others' way
-Consider skimming any parking lot dings before you coat it. I'm glad I took the time to do so
-Don't repaint the black trim around the windows until after you've rolled the Monstaliner. If you're like me you'll find some way to get it on the fresh black paint and screw it all up again. And it's basically impossible to get off easily.
-Don't be lazy or rush prep. Be patient and meticulous and it will come out awesome
-I debated on pulling the front and rear windows, but in the end decided I didn't want to risk not having a good seal over the texture. Afterwords I thought "You could have just brushed it on in those spots, stupid." It still looks good though and you can only see red paint if you are really looking close around the windows. I think if I have them replaced the new, non-sun-damaged rubber will cover everything nicely
-If it hits your garage/driveway floor, clean it up right away. It's not coming off without a fight if it hardens there