First, I'd suggest that you call Klasskote to ask these questions. They are very willing to spend time (and your nickel dime) to answer all concerns you may have. You should have received some data sheets along with your order that answer most of these questions. (612) 243-1234
I spoke with Klasskote regarding these questions a few months ago. The responses were:
Non-Klasskote thinner may be used for thinning the paints, but the KK-branded thinner is preferred. Any good lacquer thinner may be used for cleaning equipment (guns, brushes, whatever).
2 weeks may be long enough for butyrate to outgas, but they recommend 1 month. The cure really needs to be complete. (That's one reason why I chose to use only Nitrate for the substrate.)
Spraying pressure depends more on the type of gun than on the paint, which you can always thin to meet the needs of the situation. In general, use the smallest amount of thinner that will give you complete atomization at the lowest pressure. This will require some experimentation (and a bunch of plain cardboard for targets). In other words; you must have complete atomization, and then juggle pressure and the viscosity of the paint as necessary.
They strongly urge that a good finish is accomplished at the smallest weight gain, with: first a light mist coat; and then a "wet" coat 2 - 24 hours later.
If you call Klasskote and get different answers, I'd really appreciate knowing just what they were . . .