Use for inking to trace hollow lines. It g gives the model a three-dimensional feeling and makes it appear more realistic. 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 Markers 3 Black, Brown & Grey extra Fine Tip / for Panel Lines Uk
MR.HOBBY Gundam Marker 3pcs GM01 GM02 GM03 Black Gray Brown Thin Line Drawing Pen GSI Color Oily Markers for Plastic Model Kits
Gundam Markers for Panel Lining
Gundam Marker Pen For Panel Lines
This is the GM01 Black Fine Line Gundam Marker from Bandai.
Bandai Gundam Marker Black Fine Line
GSI Creos Black Fine Point Gundam Marker GM01 – USA Gundam Store
Basic Panel lining with Gundam Marker GM01 BLACK
Vintage Revell HOT ROD' Custom 57 Chevy Nomad Model Car Kit
Bandai's HGBF Gundam Lightning Black Warrior: Lego That Memory – Jon Bius Scale Models
Gundam Marker Pour Type for Panel Lines Set, GUNPLA SA
Bandai Gundam Marker Fine Line (Black) [BANGM01] - HobbyTown
Gundam Marker GMS112 Real Touch Marker #1 Set of 6
MR.HOBBY Gundam Marker 3pcs GM01 GM02 GM03 Black Gray Brown Thin Line Drawing Pen GSI Color Oily Markers for Plastic Model Kits