A matte, water-based black gouache that’s perfect for controlled weathering, shading, and deepening shadows—and you can keep adjusting it with water until it looks right. 
 
What it does
Creates strong shadows, grime, and dark staining in recesses and around details. 
Gives you full control: blend, soften, or remove excess with a damp brush (reactivatable after drying). 
Dries to a matte, opaque finish—great for subtle layers or bold contrast.
 
How to use
Apply straight for deep shadows/grime, or dilute with tap water for soft shading and filters. 
Blend and feather edges with a slightly damp brush to avoid harsh lines.
After it dries, re-activate with water to refine transitions, lift highlights, or clean up mistakes. 
 
Best for
Panel line grime, recess shading, soot marks, engine areas, basing shadows, “oil & dirt” buildup, high-contrast weathering. 
 
Key details
Water-based gouache (opaque pigments + water binder)
• Matte opaque layers
• Dilutes with tap water
• Water-reactivatable after drying
• Can be applied over acrylics/enamels/oils (once dry)
• Works on plastic, paper, cardboard & more
• Clean the surface with soap and water before use. 
 
ChalkyDot Tip
Use it heavily thinned as a quick matte “grime filter” in recesses—then remove most of it with a damp brush for instant depth.