I've been using Klasse products since 2005 and I really like them (both Klasse All in One as well as sealant glaze). When I first got them I read that if you wanna have even better results with SG that you wanna apply that 2nd coat of SG 12 hrs later, ofcoarse you'd wanna wipe down your car first with your favorite QD. The very first time I did this to the car I had at the time (2005 Crossfire Limited-Aero Blue) it really popped and since then, I was sold on the products, even chose their name for my screen name everywhere I visit too!
Little tip, dunk your applicator into a bowl of water and wring out pretty good and get yourself a little squirt bottle to apply the product into the pad. You literally want the product to squirt onto the pad and honestly, about 3-4 quirts is enough to do an entire panel. Once you apply it, just wipe it off right away and move onto the next section, easy. That 2nd coat is the key IMO for longer durability too, good luck to you!!