I thought this technique was more difficult than it turned out to be. I found that it’s best to use polishes that are more fluid (newer polishes for example). I started with one coat of my base color and gave it a while to dry. Then I applied one more (generous) coat of my base color (one nail at a time!) and applied the other two colors while the base was still wet. I simply used the brush of the polish itself for this. Give it a while to dry and then add top coat for extra shine 😀
Have you tried this technique yet?