I have a deck that is approximately 20 years old. I've had an outdoor rug on it for the past 5 years and recently pulled it up. My deck is very worn beyond just power washing and restaining. I would like to know if there is some type of "finish" that I could apply to the deck. Financially I am not able at this time to replace the deck and am looking for something that will last a good few years. Help anyone???