More to explore:
kylie's kraft room: Mad for Markers - Tutorial - Colouring "white" images
Copic Coloring white images from Kylies Kraftroom
Create snow with Copic opaque white! Tutorial and stamp design by Some Odd Girl
Copic Tutorial - Coloring White with Copic Markers
coloring white tutorial
An image I colored with copic markers
An imaged I colored with copic markers
Coloring white clothing with Copic markers
great tutorial for mirror image stamping technique Stampin' Up!
Burger Tilda, Summer Memories collection, Magnolia stamps
Just4FunCrafts and DoveArt Studios: Coloring White Objects and Snow - Tutorial--Jenn Dove has a great tutorial on coloring white objects here.
Copic Tutorial - Colouring White
Free Coloring White Sample page from my Copic Certification teacher, Marianne Walker.