It's funny you say all that
@RattyMcClelland because I had exactly the same results, and came to the same conclusions, OK, but not what I was promised.
The problem for me was we were assured it was the latest best thing, and nothing would compare, but sadly other products did compare, and way out performed it.
As you might know, my van is quite pampered, and being Black it needs constant attention, also the miles I do mean it's pretty much a dally chore, but when we applied this to the roof of my van, and the wheels, we also applied our own PTFE paint sealer that we use on Caravans and Motorhomes to protect them from premature fading, which is basically the biggest issue in my industry.and what we specialise in fixing.
The PTFE was applied to the rest of the van, leaving just the tailgate with a simple wax, just for testing purposes. Sadly even the basic wax beaded longer than the Ceramic on the roof, but the PTFE outlasted all the applied products and is still doing it's job perfectly.
We kind of knew due to the consistency of the Ceramic product that it wouldn't really work on fibreglasses, because it just sucks the product into the panel and has pretty much no advantage against a thicker creamier PTFE which hasn't actually failed us in 6 years of applying.
Thankfully Gtechniq sent me several bottles of different products and a few other things for free, and knew what I wanted to test it on, so at least I didn't just start using it in my business (which we wouldn't without our own testing first) and I didn't pay for it, bonus.
I'm sure these products have there place in the world, but in my situation they just didn't compare with the alternatives.