I just received my gallon of FK 425 so I haven't had a chance to use it yet. I bought AW after reading all the positive comments and my first bottle is almost empty. Can someone explain the difference between the two? I know one is more of a WOWO spray wax and the other is a QD. I guess what I'm looking for is what is the difference in terms of looks and durability between the two. Secondly, would a "blend" of the two work? Thanks for all the experience and knowledge - I hope 425 is as good as the AW advice.