Sanford uni paint marker, oil-based, fine, blue ink opaque oil-based paint markers are perfect for arts and crafts. Paint dries opaquely on practically any surface. Acid-free paint is weatherproof and fade-proof. Fade proof/water proof/abrasion resistant/acid-free ink/weather proof. larger quantity quotes available. Please call 1-888-978-7759. this product arrives to most customers in 2-3 business days.