The chalkspray is a chalk-based pigment spray that is ideal for outdoor temporary marking as well as for indoor studio artwork. Available in 10 powerful colour shades that are deep matte and high covering. Montana Chalkspray can be applied on various surfaces such as sidewalks, walls, cardboard or canvas. Depending on weather conditions and climate outdoor marking lasts between several days to several weeks. It fades more quickly during extended periods of rain or in high traffic areas. On non-porous surfaces like glass or metal the pigments can be removed easily. Removal from porous surfaces may take longer.