I'm used to powder coat, so I need some advice. I know I need to mix it with some thinner, but I'm not sure how much. In a perfect world I'd like to mix it with thinner and leave it in the jar for future use. Is that a possibility or do I have to mix and use everything I mix right away? Also what's the mixture usually? I'm not spraying it on just brushing it on and so far I've found that its thick and hard to make look really good and seems to start drying pretty quickly.