I found a Gundam Marker GM02 laying around and attempted my first-ever panel lining : r/Gunpla
Tutorial: How to Make a Simple Gundam Marker Holder Version 1 by Gundam Kits - Gundam Kits Collection News and Reviews
Everything you need to know about Gundam Markers including how and how not to use them. : r/Gunpla
Gundam tutorial 2 – A little guide on using Gundam Markers | The Toy Room
Gundam Marker Airbrush System Tutorial via Dengeki Hobby - Gundam Kits Collection News and Reviews
How to Gunpla: Painting Tutorial; Marker Pens, Hand Paint and Bare Plastic by Lincoln Wright — Paint on Plastic | Painting plastic, Painting tutorial, Marker pen