Thought I was heading in the right direction but ..... proved me wrong. I was going to do a simple casting of scales on a fish using silicon out of the tube. I purchased GE 100% Silicon and mixed in a dab of Acrylic paint and it never did set up? Then I mixed in a little glycerin and that did not help. I thought the last time I did this all I used was the paint and it set up in about 15 min.? Where am I going wrong?