My friend isn't on these forums, but she dabbles in custom pony making. She's going to have the chance too meet the woman who was the voice actress for Demona in the Gargoyles cartoon, and she is making a custom Demona pony. She would like it autographed by the woman, and when she asked me about using a sharpie on the pony, I advised her against it.
She was wondering if anyone here has any suggestions as to how she should go about this. She wants the autograph to last. I'm just not sure what she should do.