I had my GS done by Joel at his Ashford, Kent location yesterday. Although they state that they are not a valet service, my bike came up absolutely spotless as usual. I also decided to go for the XCP Rust Blocker treatment instead of my usual ACF50, for an extra £15.00.
AYB state that this product is a new generation ACF50 with superior qualities over ACF50, such as longevity and durability. It's applied in the same way, which I like as it creeps into all the difficult to reach places.
I do ride through the winter so will be interested to see if the claims of it being a superior product to ACF50 are true. I will report back in early 2019.
Keep it shiny side up guys