Chalk Markers Chisel Tip
Or, Liquid Chalk in a Marker with a Chisel Tip have a strong opaque ink that is removable with a wet sponge. Once dry the paint will resist rain until light friction is applied. For sealed surfaces such as glass, plastic, metal and any gloss & semi gloss painted surfaces. The Chisel Tip has a nib 8mm across. Not for blackboards and porous surfaces.