RE: rub out nelson's clear?
Jerry says rubbing with MEK will bring back the gloss of a sanded surface, but I only found it to be semi-tru with the color and not the glossy stuff. I tried to polish and wax a cowl that was sprayed with high gloss, but the finish didn't change. I'm guessing you'll either have to spray another coat of a slightly glossier mix or leave it as is.
I like the flatness of how it looks now. You did a great job.
The Nelsons's can test the paitence of a Zen Monk...