Sanford uni paint marker, oil-based, medium, assorted ink, 12/set vibrant, oil based opaque paint markers mark opaque and glossy on light or dark surfaces. Dries opaquely on glass, wood, ceramics, china, leather, cement and practically any other surface. Paint marker ink is fade resistant, water resistant and abrasion resistant. Acid free. Fade resistant/water resistant/abrasion resistant/acid-free ink. this product arrives to most customers in 2-3 business days.