You have gotten some good advice here. A couple things to remember though: If a jobber is mixing you some paint to add to raptor liner, it should be mixed without binder and balancer. You want the toners only.

Also, raptor is a great product but can become brittle over time. I have seen it crack before. Not that our cars are going to be subjected to the same kind of abuse that a truck bed would be under, but it helps to have all the information that you can get these days.