Here's a question that just popped in my head with the recent update. Have you ever heard of heat sealing the foam? After looking at the image, I saw some dark patches under neath the red paint. Anyway, heat sealing the foam actually closes up the microscopic indents left behind when the foam was being made. All you need is one heat gun to close up the pores and then cover it with the Flexpaint before you paint over it. It could minimize the black patches on the costume.