AMMO by MIG Anti-Slip Paste - Textures For Modelling
Color: Sand for 1/35

From the Manufacturer:

High quality acrylic product to realistically represent non-slip surfaces in 1/35 and larger scales, as well as other rough textures of any surface type. The sand colour will be extremely useful when working on dark-coloured plastic. Apply directly from the container and spread the paste with a brush. For optimal results apply two layers, the second layer perpendicularly to the first, in order to obtain a perfectly uniform texture. This product easily adapts to your needs to create different textures by tapping the surface with a brush, a sponge, by adding water, or by building up the effect in several layers. After drying for 24 hours, this texture remains securely attached to any surface.