Wow, I'm into cum on clothes, but it's already a rare niche, so good luck finding an even more specific subniche of a subniche. (cum > clothes > velvet)
That said, I've done the same thing, but just not velvet. In fact, velvet is about the worst cum on clothes, other than silk maybe, but hey, that's my opinion, to each their own. I like lycra, denim, hose, net, cloth, leather, lace, etc etc. But I also like the challenge you give, so the next velvet pics I find, I'll put them here!
You have ones to show us to get us going?