How to make a colourful rainbow feather ^^

The brush I'm using is one that I've trimmed myself c: Learn how to in this video: https://www.youtube.com/watch?v=mWAXlpaaaew&list=UUYC675hfq69NCmoYNOiQnpQ&index=1

Polishes used:
- Essie: 'Blanc'
- Seche Vite: 'Dry fast topcoat'
- OPI: 'Matte topcoat'
All the colours are acrylic paints c;

Music:
Clear Air by Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
http://creativecommons.org/licenses/by/3.0/