I got some of the Kilz spray on. I started to shoot it and it came out in big globs and fell directly to the floor.
I need to take it back and get another one that works, I will try it in the parking lot this time before I leave the store area.
I like the idea on the joint compound also, if the Kilz does not fix it then on with the compound.
I really appreciate all of the information

The gun I was referring to is used mostly on car finishes, but can be used on any painted surface. I took a car in one time to get paint, They shot it in several areas. They used the information to mix the paint for me. It turned out perfect.