So this was my first successful attempt at using tape to get straight lines. I'm usually too impatient and put the tape on too soon which messes up the base colour... I was determined to make it work this time, though, and it did!
Just as a side note, I'm going to point out that I really love this gold, it's shiny without being glittery, if you know what I mean.
Revlon - 955 Quick Dry Base Coat
Sally Hansen - Barracuda
Sally Hansen - 650 Navy Baby
Essie - 941 Good As Gold
Rimmel London - 100 Base & Top Coat