I know this is an old thread, but I would like to say I LOVE the flattening agent. This was my first time ever using a flattening agent, but it went quite well. I used 30% flattening agent mixed with the activated Universal clear and this is the "Sheen" I got for those also spraying for the first time. These pictures are 48 hours after spraying.
Settings: Sata 5000brp, 1.3 (actually 1.4 measured), 26psi, fluid 2-1/2 turns out, full fan, garage temp 76*F