Rust-Oleum Specialty No Hunting Purple Spray Paint is to designate a no-hunting zone without posting traditional signs. When used properly, this is an ultra-durable, weather-resistant formula. It legally indicates a no-hunting\/trespassing\/fishing zone in participating states. Paint marks must be readily visible to any person approaching the property and must be no more than 100 feet apart. Each mark must be at least 8" wide and at least 3 ft off the ground and no higher than 5 ft off the ground.