How to paint a canvas drop cloth?

To paint a canvas drop cloth for art, floor cloth, or custom decor, you need to prepare, prime, and paint properly for durability. Start by buying a cotton canvas drop cloth from hardware store, such as 9x12 feet 8 to 10 ounce, and wash it in hot water to remove starch sizing and pre-shrink, then dry and iron flat to remove wrinkles. Lay it flat on clean surface. Apply 2 to 3 coats of acrylic gesso or latex primer with roller, letting each coat dry and lightly sanding between coats for smooth surface, which seals fibers and prevents paint from soaking through and makes colors vibrant. Once primed, sketch design lightly with pencil or chalk. Paint with acrylic house paint, acrylic art paint, or porch and floor paint for floor cloths, using brushes or rollers, building up layers. For floor cloths or outdoor use, paint both sides to prevent curling. After painting and drying 24 hours, seal with 2 to 3 coats of water-based polyurethane or polycrylic for protection, especially for floor use. Trim edges or hem for finished look. This creates durable painted canvas rug, backdrop, or artwork that is washable and long-lasting.