This it the most popular panel liner. Available in 3 colors. GM01~03 Panel lining is the first step of Gunpla customization beginners can try. It is a
Gundam Marker ~ Ultra Thin Pen Point for Panel Lining 劃線筆,勾線筆 [油性]
Gunpla Tutorial: Basic Panel Lining
How to put panel line on Gunpla using Gundam Markers
HOW TO PANEL LINE YOUR GUNPLA
Sealed Trading Card Boxes, Non-Sport Trading Cards, Collectables - PicClick AU
Use Gundam Markers to bring out panel line details in your GUNPLA! [Beginner GUNPLA Tutorial 02]
Gundam Marker: Gray (Fine-tip for panel lines)
How to Gundam Marker Tutorial by Lincoln Wright
CAN IT PANEL LINE? - Can You Panel Line a Gundam Model Kit With Household Pens?
For Bandai Gundam Mr.Hobby Gundam Marker Pen Fine Tip For Panel Line GM01 Model
Sealed Trading Card Boxes, Non-Sport Trading Cards, Collectables - PicClick AU
G Project - Panel lining! An easy yet effective way to give your models that extra bit of flair. Here are some of the more common options: 1) Panel-lining Gundam Marker (スミいれ用)
Sealed Trading Card Boxes, Non-Sport Trading Cards, Collectables - PicClick AU
Beginner Gunpla Tutorial: How to Use Gundam Markers
How To Panel Line a Gundam Model Using a Gundam Marker Pen – Gundam Express Australia