Testing Sherwin Williams G60P2 Primer

I've tested the Sherwin Williams G60P2 Wash Primer over NAPA 7220 self-etching primer. I wanted to make sure I didn't have to strip the 7220 that I'd used on all the mating surfaces plus a few more early in the build like the horizontal and vertical stabilizer rear spars. Drum roll and envelope please. And the answer is it adheres great over the NAPA 7220. I couldn't tell any difference between it and the section of bare aluminum and bare scuffed aluminum even after a scratch test and scotchbrite rub.