I used the Sunflower Sunscreen on my Friesian gelding and we both hated it.
Didn't help the fading at all and left a tacky residue. Plus TJ must've hated the scent or something because he threw a fit when being sprayed w/it? Bleh.
I just started using Quic Screen and prefer that much more. Can't attest to it's fade resistance yet, though. I also like the Santa Fe Coat Conditioner which is SPF 8 (smells like beach sunblock, too...like kinda' coconut smelling!
). However it's a low level and you work it into the coat (as oppossed to spraying or hand stroking on like a barrier) so you would have to use it everyday. The Quic Screen bonds to the hairs (on a clean coat) and is supposed to last for up to two weeks. We shall see.
My next product to try was Cheval International's Misty Sunscreen.
I also find that the heavy duty bug sprays that offer UVA/UVB protection work well, too. 'Cuz they are meant to bond to the hair and last for days! I use Endure.
I haven't tried Quic Black shampoo, but I want to.