I've been using black permanent markers as joint touch up for a while now, but I never thought of using other markers for colouring. Now that I see this I just might. That blue looks GREAT. Overall, this looks great! The colours, details, and the markings all go together perfectly.
The figures contained in the Custom Showcase are not for sale by Figure Realm, and the creators of the customs are no way affiliated with Figure Realm. The Custom Showcase is purely for entertainment purposes and only provides a means for the creators to show off their work and trade ideas. Figure Realm does not make or sell customs.