I never put a used or coated pump in a motor. If its wore that bad that it needs coating get a new one. Where do you think that coating ends up as it comes off. I get 60-80 PSI cold with a new pump and a fresh build. You all want to coat the inside of a pump and send it through the motor go right ahead. Not me I will stick to the new pump. When an oil pump comes out it never goes back in my motor. I don't care how long its been in there.