I don't know how you did the paint work, but I'm thinking.........
The body is painted and detailed first, then all but the gown gets masked, and several very thin coats of the gown color are sprayed until the semitransparentness of the material is reproduced. Then, the folds, and multiple layers of fabric, can be gradually darkened to the final colors.
Yeah, it is a very small figure to achieve those results on. What you have there looks really good.