I looked up some pictures of different snowflakes and just went off of those pictures.
I also used acrylic paint and a fine art brush. You can do this with polish, but I find that you can get thinner more Precise lines with acrylic or even a stripe write polish.
Before I started my snowflake I did a sponged base for more depth. Feel free to skip this step and just put a base color of what you like.
I added some frosty polish onto the snowflake. And a couple dots.
Then add a nice thick top coat to seel in the snowflake.