<VV> Floor Mat Painting Question

[wblanning at comcast.net]

I want to see if anyone has had good success painting rubber/vinyl floormats, the kind that lay on top of the carpet.  I have painted some using vinyl paint in spray cans, but they get spotted once they get wet and the spots don't go away when the water dries.  Has anyone tried anything else that works good?  How about spray cans of bumper and trim paint?

Thanks,
Wade