Okay, the suggestions I have received for my Mercedes Diamond White paint have all been recorded and I hope, in time, to try most of them. The first suggestion was given by custmsprty who recommended some Polish Angel products. So, I decided to try them first. I just ordered two products I think will work with my paint very well - Snow White Carnaubaflockencreme and one of their very newest products - High Gloss spray.
The Snow White's description seems to have been built for my paint and protection is shown as a year. As I said previously, I really like Wolfgang Spritz for ease of use, good shine and acts as a sort of hybrid, ie, bridging both a stand alone sealant and QD "topper". The PA High Gloss spray description shows it to be almost exactly in the same category as the Spritz but with even more emphasis on gloss which is what I am really looking for.
I hope that an application of Snow White which will protect for a year, followed by periodic applications of the High Gloss enhancer will give me the results I am looking for. I may do half the car initially to compare it with my Sonax system. This won't be done for a couple months but when I finish I will post photos and a review. Then, it will be on to try something else!!