I am also a urethane user, I use it because that's what we use at work, I spray urethanes everyday so I'm used to working with the stuff... I spray my models at home, in the garage, I installed a fan and of course I use a respirator. A respirator should always be used when spraying all paints, not just urethanes. And I would never spray any paints inside a house. When I lived in an appartment, I was painting my models with a brush and Humbrol paints, then polished and got surprising results, for brush painted models!
I use a 4:1 urethane clear (used many brands like Nason, Fusion, RedLine, Select, all 4:1) and spray only one coat, with a mini HVLP gravity feed spray gun, and if I'm lucky, there's no dust on it and doesn't need any polishing, otherwise I just sand off the dusts with 2000grit sandpaper and polish with 3M perfect-it compound, then some Turtle Wax.
So here's the results I usually get, this one was not polished at all, not even waxed.
Me, I am satisfied with the results I get using urethane. But do you guys think the clear is too thick on this SuperBee? Feel free to answer, I am open to criticism and sorry if my english is bad, I'm french!
BTW, outstanding model there David, as always!