I bought a pint of this RL River Rock Hidden Peak for a simple, 32 x 75 inches door that was primed-ready-to-paint. Guess what? I was barely able to do two coats on one side of the door and only one on the other side. Went out to get a second can (now I'm almost at the price of te gallon!!!) and after a third coat, still don't get an even coat and also get those roller tripes. The second can is about two-third empty. What can I do now?