ReadySeal would be the first chiose. Then Wolmans( you can get wolmans easier) It's better to use a penitrating sealer and easier to maintain. The other products you end up having to strip tp re-do.
I use ready seal clear for the natural look. I see 900 dollar range 9 gallons of ready seal dollar per sqft. offfer yearly maint wash the floor and hand rails for 250 to 300 lite coat of ready seal 3 gallons. Takes 2 to 3 hours labor. do the...
marble and granite is a combination of diamonds to resurface and powder acids to polish. Also cleaning and sealing. Other stones like field stone fireplaces I use various grinding tools and cleaners to detail. These come out looking beautiful. You...
I use bleach all the time to clean decks. Just control the dilution rate. I do yearly maint, of decks without any problems. I would say that pressure treated will last for ever with cleaning and oiling.