@Maycrestmom: Yes, the pony will be a unicorn

I think I'll just try the Triple thick and pray. In one thin coat I think you may be right, and it will be OK. The texture on the corset was so fine, I was afraid the paint would cover it up, but it worked out nice. I just pressed some tule into it. The blue I actually did in three shades, one matte, metallic and pearl in a mottled way to give it more of a snakeskin look. Up close, it's subtle but noticeable. In photos.. not so much lol.
@Thewormwood: I don't mind if I have to spray the entire pony if it means I don't lose her sparkle. Liquitex gloss Varnish and I do NOT get along. I bought a bottle when I was beginning customizing and it dried sticky every time I used it. And thanks! The lavender, believe it or not, is a Folk Art metallic. I hear lots of bad things about Folk Art, but I have never had any issues with the metallic colors.