If the pontoons are dirty or stained, Simple Green will clean them up nicely. I use the emerald colored concentrated style in the spray bottle. Walmart and most auto parts stores carry this. Instead of Armor All, try a better product called 303. It also comes in a spray bottle. Just follow the directions. It will treat the pontoons and provide some good UV resistance. It lasts longer on watercraft than similar products. It is available at West Marine and BPS. Check online as well. I have used both on my kayak for years with excellence results. They were recommended by Wilderness Systems. Good luck.

Coach