Dying feathers?

[luvjign]

Similar to the thread about dying hair, what would you use to dye Bobwhite down (marabou) feathers......specifically florescent colors (besides cool-aid)? Something that won't leave them all matted up. The makeup is not so much down, as there's about half of it that's solid light brown feather with the black stripes in them. They're a fairly light grey to almost white otherwise. I've got bookoodles of them under my quail pens, and they make a mean lookin' jig.