I notice in of the pictures you are not using an air pressure fed mask which I thought was necessary for these types of paint.
Can you tell us the type of mask you are using as I hate using the air fed mask.
I probably should use a fresh air system, in fact I even have one, but the truth is, the paint booth moves enough air that I'm never standing in a cloud of overspray anyway. The mask is a 3M carbon filter mask rated for iso-cyanate's. The very first paint booth that I had years ago did not have a strong fan and there was always overspray in the booth. I always used a fresh air system then. Since I moved into full size automotive booth's with proper fans, the overspray gets sucked out very quickly. You do need to make sure to keep the filters in the mask fresh though as they do break down.
What is your secret for the dreaded last second dust particles that find their way onto that super gloss? Do you have filtered air supply ventilation?
Wet sanding and polishing is the secret, you can't see it in the pictures but there is a few pieces of dust in everything. I've sprayed in half million dollar down draft paint booths and you still get a bit of dust in there. The only way to an absolutely 100% smooth finish is to wet sand and polish. That part of the tutorial will be coming along shortly