You could top with another sealant like UPP. It is crazy slick and adds to the SG shine. Since it is an acrylic, no fear of going back again with more SG. It you top your SG with any wax, then you must continue from that point with waxes - or start over again with AIO, as any acrylic won't bond to wax. If you stay the acrylic sealant route, you can get some SONUS Acrylic Spritz for a QD - it brightens everything up in 20 minutes (when you don't have the time for another full layer).
The Honda in my sig has, as of today, AIO, SG, P21S, Souveran and Natty's. I'm not going the wax route these days, but I'm just biding my time until the weather gets a little more "friendly", then I'm going to polish out the few scratches I have and lay down to serious layers of sealant to help combat Houston's fierce summers.
