I went to their site for info this quote stands out "Never stain, sand, or paint again with a PlasTEAK deck" I hope this helps.
Care and Maintenance of PlasTEAK Decking Lumber Carefree Maintenance with PlasTEAK Decking
Never stain, sand, or paint again with a PlasTEAK deck, dock, or porch. Once your project is installed, it is set for a lifetime of carefree enjoyment. If PlasTEAK gets dirty, a quick hose or mop is all it needs. No special chemicals or sealants required. PlasTEAK plastic lumber can even stand up to pressure washing for a thorough, like new clean.
#61623; Hose or sweep off periodically. #61623; High humidity or low circulation installations may require a periodic low dose bleach wash. #61623; Sweep snow off of the deck with a stiff-bristled broom. If heavier snows occur, a plastic shovel should be used to prevent scratching and gouging. #61623; Unlike wood or composite decking material, mold or fungi cannot penetrate and permanently stain the PlasTEAK surface. A good blast with a pressure washer is all that is normally needed to keep your deck clean. #61623; Cleaning of light surface marks can be accomplished with a solution of Trisodium Phosphate (TSP) and water as directed on the package #61623; Stubborn stains, such as rust spots from furniture, can be removed using products such as “IRON OUT®”, without causing any damage to your deck.