As promised, I tried mine this weekend both on top of wax and on bare paintwork although it may not count for much because I didn't use a great deal of it (I intend to stick with wax for summer and use C2 for my winter protection this year), my conclusion is - as Downhuman suggests it doesn't seem to play well with wax.
It went on the bare paint perfectly well with no streaking at all, however there was was noticeable streaking when applied over the wax. It did occur to me that it may be an over-application issue, so I tested this too on wing mirrors by spraying onto a microfibre and wiping over the bare paint first (with no streaking) then wiping over another wing mirror with a layer of wax on without spraying any more on the microfibre and it still left streaking.
The good news is that on both streaky applications were easily resolved with a quick buff using a damp microfibre.
I also used the Britemax CleanMax which I found to be very good; lovely and slick, exactly what you need from a shampoo and good cleaning ability too. I may replace my usual Slick & Suds with this when I've run out as it's the first shampoo I've used that's as good.
The Hubikote Restore polish is okay. It has slightly more cut that 85RE so it's definitely a finishing polish. It leaves a good enough finish but I don't think it'll be replacing my Menz polish, it's a lot more runny and can be a bit difficult to buff - especially when over-applied, which is easy to do given how runny it is. I tried it both by hand and by machine, I was left underwhelmed by hand. It was better by machine but requires more working than 85RE as isn't as easy to buff. I didn't experience any dusting at all though (even when over-applied), which did impress me.
I also had another bash at last month's clay & lube now that it's a bit warmer too. The cay itself was okay (despite getting VERY sticky when it got too warm!), the lube however left me with very mixed feelings still - use too much and it seems to deteriorate the clay (more-so with the Dodo Juice clay I also tried with it) and the usual issues of not using enough, I found it very difficult to get the right balance.