Sprayon SP 603 Blue Layout Dye, 12 oz Aerosol, applies a smooth, even coat for all layout work. Dark blue color provides sharp contrast of scribed lines against clean surface. Dries instantly and will not rub off. Fine clean lines can be drawn on this non-glaring, non-flaking coating. Adheres to all metals, aluminum or glass. Removes easily with Sprayon SP 606 Layout Dye Remover.