Step 1
Create the form with the color with which you want it to be outlined
Step 2
choose the color with which you want the form to be colored
and fill the the form, leaving an edge of the previous color
(
as for everything,you have to practice a little to be comfortable working with a tiny brush)
Step 3
from here you can add other details
I work with acrylic paints to create almost anything
It dries faster than nail polish
and they resist very well if it is sealed with 2 coats of top coat