Washed the car today, I did one thing that I haven't done before and was to finish off the car with a burst of Bowden's Own Happy Ending
https://www.bowdensown.com.au/happy-ending
It's hard to to tell right now if it did anything, as the car looks awesome immediately after a wash anyway, so maybe over the next couple of days I can reassess.
In the meantime, here are some photos: