I have painted more vehicles and boats than I would have preferred to and have used TCP Global on many of them. The Restoration Shop urethane looks good on older cars and goes on fine when mixed 4:1:1 using slow reducer and waiting 45 minutes in between coats at 70 to 80 degrees with minimal air circulation. No solvent pop and very little orange peel when spraying 3 to 4 light to medium wet coats at 29 PSI.
Wait 8 hours, sand what's needed with 2000 grit wet paper then 3000 while it's still soft and then buff it out. Doesn't take long for their paint to get hard as a rock and more difficult to sand.
On things I don't really need to sand and buff or I if I want extra depth I'll use TCP urethane single stage paint and spray two medium coats then spray a third coat with 25% TCP clear coat, (hardener and clear coat), blended into 75% mixed color paint, (color, hardener and reducer), followed by a fourth coat of 50:50. Won't be as smooth as cut and buffed paint but it's good enough for the girls I go out with.
For the price I don't think TCP can be beat.