I have been using C3, but have become frustrated about how bad the air bubbles have been. I am looking at testing out a new type of wax to use, and was considering GB 464 or CB Advanced. I have heard good things about both, but would like to hear from this board. Also, a concern I have about the 464 is that I have read about its lower melt point. I live in South Carolina, so I am concerned about shipping during the summer, when outside temps can hit 100 pretty regularly. Can anyone else shed any light on this, if they have had problems with shipping. Thanks!