Jim,

I spray with a Walcom STM HVLP gun. The trick is the amount of reducer to add. In this case I reduced it 150% the instructions said to reduce it 1 part, which is less than 10% not nearly enough. I have reduced 2021 by as much as 200-250% and it flows wonderfully. I sprayed the first light tack coat over the plane, then came back and started over again, so about 15-20 minutes I would guess.

DR