Star brite says its new Ultimate Vinyl Guard with PTEF is like sunblock for your vinyl. It also enhances the appearance of vinyl, rubber, plastic and leather surfaces, giving it a durable, semigloss finish. The PTEF polymers bond to the treated surface to create a barrier against UV damage and to help repel stains and dirt. Available in a 32-ounce spray bottle, it costs $24.99 at West Marine.