I know if I just used a matte polish this would have been much simpler. Since I don't own any I started with two coats of Downtown LA, followed by Seche Vite top coat. Once it was all dry I taped off the tips. I wanted to make sure I got a really crisp line so I used striping tape. You can see I got a little confused with the process on my pinky nail. Then I painted on China Glaze Matte Magic from cuticle to the tape. With that extra coat it made the polish get a little thick where it met the tape.
I had debated whether I should do it this way or just start with the matte coat over the whole nail and then paint the tips next. I'm pretty sure I should have done the latter. I just thought the Seche Vite would dry it really well so that the tape wouldn't mess it up. I'll try it the other way next time and will let you know how it turns out!