Fits MSD heads
Feet:
https://www.shapeways.com/product/6473239JG
Hands:
https://www.shapeways.com/product/3TWHCAFPU
For frog parts:
Head:
https://www.shapeways.com/product/ZQYHELLAH
Flipper hands:
https://www.shapeways.com/product/9M95BY3EV
Flipper feet:
https://www.shapeways.com/product/HHDFY92A4
This material can be colored with any permantent marker.
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Dying & face-up:
The white version of this material is a little bit like blotting paper, and will dye very easily. For dying Rit dye can be used, also alcohol inks. Use a dipping method. Don't soak in alcohol or other coustic fluids or solutions. Let dry thouroughly before the next step.
For face-up, I'd suggest 3 coats of MSC or even a paint-on varnish and then try to do a face-up, relying heavily on acrylic paints. (A method using pastel poweder may not work well.)