I think out of the Avengers ponies that I've made, Natasha was the easiest. I wish I tried harder on getting the right color for her hair, instead of leaving it as a bright red. And maybe do more detail in her uniform. Originally it was lower cut, but decided not to have it so low.
Her uniform/suit is out of Super Sculpey Firm, her mane/tail is out of Super Sculpey Beige. Painted with acrylics and sealed with Mod Podge.