I've been really busy and gave him a few jobs. One job was to paint and install a new Bilco cellar door using Rust Scat alkyd tinted to match the siding. After the work was completed, the customer called saying the paint doesn't look right in one section. I go inspect it and my cousin apparently sprayed the outside with 2 coats and the inside with 1 coat, except for 1 panel he thought would be on the inside which looks like it needs another coat. And when I talked to my cousin about it, all he did was bad mouth the paint saying it sucked and he had to use "a little bit" of water to thin it out. I have a few things lined up for him to do, but I don't think he's worth keeping around if it will F'up my reputation. What would you do?