Hello
This is probably a 20yr old deck that is mostly covered. Has not been treated since built as far as i know. I am not sure if stripping and brightener would be enough before stain. We had to replace some of the wood around the edges, and fill in a spot where a hot tub use to be. Also new steps at the end of the deck. I am attaching some pics. What is your opinion on how to proceed?
Thank you
See this about new wood. https://www.deckstainhelp.com/how-long-should-you-wait-to-stain-a-new-deck/
When ready, clean and brighten all wood for the prep and then stain. Stain options are on the link above.