Miniature painting tutorial: NMM gold - Version 1 Improve your miniature painting skills with this application. It will guide you through the procss of painting NMM (non metallic metal) gold in an easy and fast way. When you master it, you can apply the technique to different NMM materials. You can also adjust it to higher quality effects or simplify it for faster painting - just follow the outlined guidelines.NMM is a technique of painting metallic surfaces with non-metallic paints. It originates from traditional painting and became very popular among miniature painters. Although it requires some skill and practice, you can master it by just following the guidelines provided in this application.