I think I can relate to what Scottwax is saying, here in the Northeast I wouldnt get two washes out of WG but others around the country whom I trust say they get months out of products that just dont last here.
When I was thinking of opening a car was years back one of the vendors I dealt with was telling me they formulate the soap based on what contaminants are present in the local area. To further his point he had flypaper on an area of his hood that was used to collect the contaminants and mix based on what he found. He was a salesman so take it with a grain of salts, a big one at that. It does matter where you are and points out the problem of the MFG in trying to formulate a product that will give the same results from Maine to Scottsdale..... quite a varying landscape.
I would hope people elsewhere get more than two washes out of Wolfgang, I loved the look and ease of use but never got more than that.
I found my new sealant in UPP but still love Klasse. I spent the last 3 days putting Klasse on and already recieved more comments than in the last 4 months. Hard to imagine a product this old still being this hard to beat.