Yogibooboo: Rav Falk is in fact VERY down to earth and “Tzum Zach”. He states the HALACHA, and NOT assumptions.
Oh, and no, I don’t wear nail polish. I think it’s really not tzniusdik. Although a light natural color is probably not assur according to halacha. But, my instinct tells me it’s not the right thing to do.