Pigments for model used to simulate age and wear on vehicles , armor, fortifications and structures of the models and to create effects of accumulated dust, dirt and smoke produced by the natural aging time . The pigments in this range are iron oxides and natural lands , particularly suitable for different climatic and geographical conditions in the grounds of a diorama. These pigments are used in the manufacture of our colors have been specially processed and micronized to facilitate dispersal in any liquid medium , water acrylic resins , turpentine or oil . To fix the pigments to the surface using an acrylic matte finish as our Mate Medium or Medium Glaze Pigment that has a slower drying , easier to simulate rain and snow washes and provides more time to manipulate the pigment in and around Details of the model. You can also perform special effects by mixing the pigments with Water & Stone products , such as clear water for purposes of grease, oil and wet clay, sandstone or pasta to create a rough surface and dried mud and thick deeply rusted and flaking metal .