Try NOT to use direct out of the can. This stuff cures with moisture, so the longer the can is open, the less time it will last if you don't use it all.
Do NOT use on a humid day. As said, it cures with moisture, and it will drastically reduce the working time if you use it on a humid day.
DO use several layers of saran wrap when resealing the can. Lots of us learned the hard way how the lid is forever sealed to the can if you don't put this barrier between the metal surfaces.
DO store unused PRO-15 in a cool place. My dealer recommended the refrigerator (lower shelf) and I found it lasts about twice as long as it would on the shelf in the garage.
DO use ALL disposable items....brushes, cups, etc. This stuff dries and is permanent.
DO use gloves. You don't want to try explaining to your boss how this takes a week to flake off your skin.
DO NOT get the metal prep on anything you care about if you use it. Just keep the metal prep to where you want to paint. It can discolor other surfaces.
POR-15 ROCKS!! Been using it for years. It'* expensive, and worth every penny. Nice job on your car. I gotta get the driver up on the lift and do some more work on mine. Oh crap...gotta get that lift first.