I finally did a swirl I'm happy with! I did the "in pot" technique at a very low trace. The scent is Cool Water, which I call "Icy Water". For the blue I used Ultramarine Blue oxide. I think next time I will use more blue and use titanium dioxide to make the white whiter. Edited because I wanted to mention, it does look rather marbled but the tiny swirl details really make me happy!