I'm not sure about the Spray Max 2K primer, but you can extend the usable life of the Spray Max 2K clear coat by keeping it in the refrigerator after you activate it. You get an extra day or two out of it.
Bartamos, like you, I always have a can of Rustoleum primer handy. Sometimes when I spray areas that I've feathered to whatever paint was on there to start, the Rustoleum 'crinkles' over the old paint but not my fresh work. I did some research on it and discovered that most rattle can paint has a chemical called Toluene in it. That chemical can react with old paint and cause the crinkling. It's a pain when it happens because then it involves sanding the primer off. And I hate to admit that I've learned the hard way (more than once!!) that when you try priming it again after sanding it off that it inevitably crinkles again.
Matt
