I left the sealer sit for an hour, then tacked it and mixed up the base color. It is metallic, so I stirred the quart can for at least 20 minutes!
Broke out the new gun, used lacquer thinner to clean it out and to adjust spray pattern and air pressure. Learned that 30psi at the gun equals 10psi at the cap.
Sprayed the first coat very thin. I don't know if this is proper procedure, but I've learned to shoot a slightly dry coat first and give the next 'wet' coat something to grip onto. Here, after 4 coats of base - it looks much darker than I thought it would, starting doubting the use of the DP90, but that decision was 'water under the bridge'.