The gun I bought was for spraying the rust converter like fur tan through it and hard to get area as it has a small tip on it it does not have a big barrel on it so it probably wouldn't spray that thick stuff. I had a hard time trying to spray some pro 15 through it. it did not like it plus the gasket is made out of some kind of foam and when I clean the gun it ate up the gasket,the lacquer thinner did. I made a gasket out of some gasket material for gas tanks and I am going to see how that works if it will spray.