As above, each wax/sealant has its own properties which affect application, curing and buffing. I once left collinite 476s on for around 30 mins. It was a PITA to buff off and I probably inflicted more swirls. With 476s and fk1000p, I apply onto 1-2 panels (depending on climate), move on to the next and then buff off the first. With something like Autofinesse, I've had to leave it on 30 mins before it's ready to buff off.