OK, listen up. Typically on newer installs like this one, you want to hit it with the nmd80 because there are usually some mortar smears or glaze from the polymeric sand if they used that. It will also get rid of the mud stains from people tracking on it. Do not do this job until everyone else is out of the way, including landscapers. You need to be the last man standing.
Buy one of the nmd80 sprayer attachments, makes it stupid easy. Once you spray it on there, let it dwell about 10min and then spray again. don’t let it dry. If not real dirty, then you may be able to get by with one application. 1500 ft you may go thru 10gal. About $80 for a 5gal here. Rinse off with light - medium pressure unless you’re just doing small area at a time. Then start surface cleaning. I leave my injector bypass on which lowers my psi to about 2000psi and you’ll be perfect. Rinse really well. Even though you’re not doing joint stabilization on this one, I still like letting it dry for a day. In fact carry your blower with you to blow off excess water and you’ll need even during the sealing phase, to gently blow out any puddles or excess while sealing.
Here’s sealer I use. Surebond Sealers | SEK SUREBOND | Hardscape Installation & Protection
You can find nationwide - can click on any of the red boxes for further description. I use the 8700 a lot and it works great on limestone.
On a job this big, you probably want to build you a little portable 12v system using 2.2 gpm pump. Here are pics of both of mine - notice the Chapin sprayer nozzle and wand I took pics of. Can get from Grainger. Just sent all these pics to @DisplacedTexan.