Portable restroom decals from Dynamic Decals & Graphics are available for smooth plastic surfaces (Super Stick adhesive). For highly textured surfaces, Monster Stick vinyl is an aggressive, flexible 3.2-mil material that contours to uneven surfaces and adheres without excessive amounts of adhesive. Truck decals are a 3.2-mil 3M material with an additional 3.3-mil UV lamination that yields a long life. Decals are made with UV inks for maximum pigment and life span. 800/472-0285; www.dynamicdecals.com.