Couldnt you use this.
http://www.ritdye.com/dyeing-techniques/tips-success

Here's What Rit Will & Will Not Dye

Choose Your Fabric & Materials

Rit works best on many natural, washable fabrics and materials, such as ...

100% cotton, linen, silk, wool, ramie
Synthetics such as rayon and nylon
Fiber blends with at least 60% cotton or other dyeable fiber

(Blends will tint evenly but will not achieve full color)
Nylon-based plastic such as those found in buttons, fasteners, golf balls & lacrosse sticks
Natural materials such as wood, wicker, paper, feathers and cork
... but there are fabrics and materials that will NOT accept dye such as ...

100% polyester, acrylic, acetate, fiberglass, spandex and metallic fibers
Fabrics with rubber backing (bath mats or throw rugs)
Fabrics with special finishes such as water repellents
Fabrics with bleach damage or extensive staining
Fabrics washable only in cold water or labeled "dry clean only"
Polyethylene plastics such as golf discs
Polycarbonate plastics such as eyeglass frames
If you are in doubt as to whether your fabric will accept dye, test a swatch.

I wont. We all have that moment.