I have had this for about a year to read and re-read, while I slowly buy the parts needed for a paint job at home. I have the paint guns, compressor, sanders, etc...and I'm almost ready to begin.Lots of good tips and anecdotes, and TONS of color photos make this a great bible to own. It hasn't answered one question however: how quickly do you need to work to keep the paint from hardening in the gun? Paint spec sheets list "pot life" but I'm not sure how to calculate it.Acrylic urethane single-stage is my choice.