First of all I just wanted to say that this site is great. Iv'e been browsing Autopia off and on for about 4 years now and learned a lot. There is one question however that has always been on my mind. I've been using Zaino products since 2002 but never liked the Z7 car wash. The suds seems to disappear after just a few minutes and it feels like I am washing my car with plain water. I wanted to know if it affects the Zaino coats at all if I use another car soap?