Here was my first attempt over silver:
Basically, it's a variation of water marbling. I placed a few drops of black polish into a cup of water then I spritzed it with rubbing alcohol and dunked my nail. I had a hard time making the type of spots I wanted. I think I needed fewer drops of black polish. The polish I used here was Sinful Colors Black on Black.
Here I tried the neon gradient that Cute Polished demonstrated in her tutorial:
What are some new nail art techniques you want to try?
Thanks for reading!