Spraying Polyurethane: Minwax Fast Drying Semi-Gloss

I had some success spraying Minwax fast-drying polyurethane with a 1.4 tip HVLP, thinned 10% with mineral spirits. Dry time was long as opposed to pre-cat lacquer, but the finish quality was adequate. 45 mins between coats, and fully dry to the touch after 3 coats, 3-4 hours out. 10-20% humidity (atmospheric) and 80-90*F. It was applied to grey barnwood, which darkened considerably upon application. While still tacky, I sprayed the pieces with white spraypaint from 1-1/2 feet away, creating a fine, even mist that stuck to the polyurethane very well. Top coats over that added dimension and a nice sheen. Screen Shot 2018-07-31 at 8.24.06 PM