Peter_C said:
Pressure treated deck? That sounds horrible! Splinters, splits, and poison right at your feet.
Either way the fastest, smoothest, and probably cheapest way is going to be to rent a floor drum sander from a local rental yard. True Value Just Ask Rentals, or most any rental yard will have what you need. The deck will be smooth and you will be working standing up, not down on your knees. Time will be about 1/8 vs sanding with an RO150, which is definitely not the right tool. Wear a good quality dust mask.
Didn't actually watch the video but the idea is correct.
You cant rent those to sand decks. Every place around here excludes decks in the rental agreement and if you destroy the sander from nails or screws in the deck you are buying the drum sander,.
If you decide to use one for a deck and the rental agreement does not exclude decks make sure you first know how to use the drum sander and second you countersink every single screw or nail or you will be buying loads of sandpaper or worse destroy the sander.
I just love people that use a drum sander for the first time on something they care about and realize to late they should of paid a pro after their floor or deck is destroyed. I dont advise using a drum sander or a sander at all on a deck, most pro deck companies do not sand decks to start, sanding is the last thing they do.
They use deck stripper and a hose a couple times. Try it you will be very surprised how well it works. Then just sand what is left and it won't be much.
I have sanded plenty of decks, once I tried the deck stripper I never went back to sanding. I strictly sand to rejuvenate decks after I have used the deck stripper a couple times, it's so much less work using the deck strippers and cleaners.
If the deck board are in such a shape you are sanding to repair damage as opposed to removing finish you may want to consider flipping the board upside down or replacing them altogether.
Me, I would use the deck stripper two or three times, then the cleaner, then sand.