Here in South Jersey we have our decks fiberglassed. No maintenance for years except for washing. You can have the gelcoat pigmented any color under the sun to match your house. On a related note but different we also fiberglass our heater laundry room floors and but a drain in the middle. Need to drain the heating system or H/W heater? No problem. Washer over flow or a supply line break? No problem.
No splinters, no rot. If it gets damaged grind it down, apply new mat re-gelcoat the spot. Good to go. Add a little non skid so you don't slip when it gets wet. If the deck is on the second floor the space underneath is protected.
