Beach scene :) the orange is two coats of "If In Doubt, Surf It Out" from China Glaze's Off Shore Collection!
Orange: "If In Doubt, Surf It Out" China Glaze
Blue: "Bikini So Teeny" Essie
All details: Acrylic Paint (Regular craft paint. Yes, you could use polish. I prefer acrylic paint because it dries faster, is cheaper, doesn't smell and is much easier to work with.)
Top coat: HK girl @glistenandglow1