There are always three sides; his, hers, and the truth. 🙂
I am not supporting putting on any type of make-up on Shabbos. I think that’s abundantly clear. However, the truth is that R’ Moshe (as a da’as yochid) was mattir dry white or colored powder. I am skeptical that any such product is (or ever was) on the market, despite claims of the manufacturers, and even despite the “hechsherim” on them.