Teddy Talk: Creating, Collecting, Connecting

Hi, everyone! I am new to this forum.
I have question about Airbrushing please.
I am using Dye-Na-Flow Silk Paint. it's easy to use, I like it very much,
but Black paint won't stay on the mohair (rub off very easily)
even after heat set.

Is there any black paint will not rub off?
do I have to wash mohair before I airbrush?
(I've tried this once but result was same)
do I need to air dry the paint before heat set?

Thank you very much.