It was a good day to prime and paint. About 70 degrees and about 65% humidity. I guess I've sort of figured out the primer gun so it went down really easy. I've been fighting a bit with the paint because the gun seem to clog up...I suppose it's from the thickness of the paint. If I take my time, it still turns out fantastic. Really happy witth the finished product. Finished up one quart of jet flex so I'll have to buy another.