It's been a bit since I've done a coffee manicure and I saw this ultra cool technique on Pinterest that led to a dead end tumblr log of pictures. So I had to figure out the technique myself and I'll do a tutorial once I have a new lightbox.
Photos aren't very good because, well, the sun is missing :( The effect feels like coffee splashing in a cup. Sadly my decal tore when I was applying it. It's hand painted so it didn't hold up to my attempts to reposition it.
Base color is Essence Oh De Prep and the copper is an unnamed from Maurices. As you can see I need a little more practice on the dots for the joining areas and practice I will. I love this effect and it's not very hard to do. Have a great day!