POSCA Artist Markers Use Water-Based Pigment Ink to Produce Poster-Like Vibrant Colours Easily Removed From Glass; Ideal for Temporary Signs on Windows, Windscreens etc Opaque Colour: Allow to Dry After Application & New Ink will Completely Cover the Previous Colour The fine nature of the 1M’s bullet nib makes it perfect for fine detailing, whilst still giving good coverage when colouring smaller areas. OMGHOWCHEAP are the UK’s largest online independent stationery retailer, offering over 3000 branded products. At OMG, we continuously strive to offer exceptional service to every customer, which is why we dispatch all items within 1 working day of purchase, and offer a 30-day returns policy as standard. Furthermore, our friendly customer service team are available to answer any queries you.