Can you use eye shadow to decorate polymer clay? 

Hi! Thanks for this video ☺️ I recently used gold eyeshadow on my black polymer clay piece for "Hitting the highlights", then baked it. Now I want to give it a polyurethane varnish coat..but when I do that, some eyeshadow highlights spreads onto the black part of the piece also, hence making it less black. Any idea to avoid the spreading of the eyeshadow while varnishing??