Can you use plastic tools with Genesis paints?

Judi asks:
Why can't I use plastic with Genesis paints?

Plastic will leach the polymer oils out of the paint as will paper. If you work the paint with a plastic palette knife, it may not get smooth and creamy, it just might get stiffer and stiffer as the oils leach out. That's also why you use glass as a palette instead of paper or other material.

Judy Leasure, TDA