Gundam Marker GM301 Black - Pour Type Pen 

These pour type markers are oil-based paint pens that are similar in use and effect to panel line wash. You can use these on either straight builds or prior to painting. Ink flows smoothly only by applying the penpoint to the mold. Any excess can be easily removed with GM300 Gundam Marker Remover. You can't use this marker on painted products because the oil will eat through the paint! Perfect for panel lining Gunpla or other plastic model kits!