About the beader problems. I HAVE had the paint "flash dry" on me, as in it was too dry to accept the beads by the time the beader, which was less than one foot away from the gun, dropped the beads on the line. But in the 15+ years I've been doing this, it's only happed once or twice. Seems like if it's very hot and a strong wind you need to watch out for this. People who stripe airports probably know it's even spec'ed into the Circular to watch for this condition and suspend operations until "The Engineer" deems you can start again. This has happened to me with latex and solvent paints, so if conditions are right, it could happen.