My show season prep for my garage queen '60 Eldorado (repainted with 2 stage paint) has for many years been the Klasse twins, topped with a coat or two of Souvereign or Collinite 915 (we're talking local show and parades, not judged concours events). But I have a love/hate relationship with the SG. It certainly prolongs the shine, but for a car that is garaged and driven a couple of timers a week and is going to have the wax refreshed every few weeks, is it really adding anything to the shine? It is always a battle to get it all off, and it doesn't seem like it's adding anything to the just-polished gloss after rubbing off the AIO; it sometimes seems like it slightly diminishes the shine. In this case is the SG necessary? Or is there a better alternative?