Black Spot Marking Paint. The spot marking choice of many industries for marking out! Signet upside down spot marking paint comes in a big, easy to use 350gm aerosol. Available as a single can, or box lots with 12 cans per box. Colour - Black - also availiable in red, green, yellow, white, orange, blue, purple, fluro red, fluro blue, fluro orange, fluro pink, fluro green, fluro yellow, fluro purple.