Paintiing on canvas. So simple. Use Modern Masters Iron Oxide Paint and Rusting Activator. Coat a canvas in acid blocking primer. Paint your accent color stripes (I chose turquoise) with Acrylic Paint. Paint two coats of iron oxide paint, leaving your accent color exposed as desired, waiting 30 minutes between coats. After your 2nd coat dries for an hour, spray on the rust activator (do this outside to avoid rust drips on your floor) and let sit for 5 minutes. Spray a 2nd coat and let the activator do its stuff for about 3 hours. The only actual painting done was the turquoise.