I've always used "Deckmate" screws...have boxes of all sizes in the garage...I think I use 2" on the decking. I like a transparent, cedar tint stain, had used Thompsons, Olympia, etc. for years, then was "told" that Cabots was superior...but learned the hard way that I don't like it on a north facing deck...oil based mebbe, but turns greenish next to house. I am also leery of pressure washing...never have...more harm than good imo. I'm no expert though....I planned to work on mine today
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I keed....I was gonna mow!