Aged Sails Technique – No Coffee of Tea, Just Bitumen paint. Discover how I weather the sails for my historic ship models using a method with no coffee or tea involved! Instead, I use OcCre’s water-based bitumen paint, diluted 1:3 with water. I carefully brush both sides of the sail, then trace the seams with clean water to keep the stitch lines darker and more defined. Once dry, I sand the sails to give them a worn, frayed look — perfect for dioramas and aged maritime scenes. This technique add