Depending if you have enough depth, that platform can look like near new with some sanding. Make sure it is all sound timber not needing any replacements.
Then, as suggested above, finish it with something protective. I use Deks Olje 1 on mine,it an oil finish, once the wood is saturated it just needs oiling every 3 months or so, and it looks good.
2005 Integrity 386 "Sojourn"