Panel lining is the first step of GUNPLA customization beginners can try. It is a process of applying ink to each piece's grooves to improve the overall look and detail of your GUNPLA kit. It is easy to apply and the panel lined GUNPLA would look more realistic and 3-Dimentional. The effect is stronger when you choose the color to ink according to the color of the model parts. In general, you can use black for dark parts, grey for lighter parts and brown for red parts.
Gundam Marker - Brown (fine) GM03 - Model Kits & Supplies » Model Kit Supplies - The Comic Hunter
GUNDAM MARKER GM-03 BROWN - ULTRA THIN
Gundam Markers — Panda Hobby
GMS112 Real Touch Gundam Marker Set 1 — Panda Hobby
gundam marker - Panda Hobby
FULL MECHANICS 1/100 FORBIDDEN GUNDAM – Toronto Gundam
GUNDAM MARKER Ultra Thin Pen Point for Panel Lining This is the most popular panel liner. Panel lining is the first step of GUNPLA customization
Mr Hobby Gundam Marker GM-03 [Brown] Ultra Thin (Oil Based)
GMS126 Fine Edge Set 2 Tapered Type Gundam Marker Set — Panda Hobby
Action Base 5 Black 1/144 – Toronto Gundam