This product is necessary to protect painted rubber or plastic. A lot of people can make a dope looking custom shoe, but after one wear it's completely cracked and scuffed off. Don't be one of those people, customers get shoes customized to rock so make sure they're durable and wearable with the Scratch Resistant Sealer. Use after completed painted the area. Apply a minimum of 5 heavy coats and dry with a heat gun or hairdryer in between coats.