I tried Fairy Power Spray recently. I have to say that I was underwhelmed by the results. Mind you, I didn't leave it on for the prescribed ten minutes as the rubber fitting were running black! Having scrubbed it off with cloth and hose, there was still quite a bit of whitish streaking on drying - enough to make me wary of a second go (although I'll give it one more chance)
Tubes finished with 303 UV Protectant - easy to apply, nice mattish finish but OMG, talk about Slippery When Wet - absolutely treacherous!