I’ve got a Clarke Hydra Sand. It’s a game changer. It’s 7 bones but it makes it so much easier to get professional results.
The HydraSand attaches to any rotary sander allowing you to operate with six 5" drive pads for maximum sanding performance. 16" diameter.
Rent you an Easy 8 and an edger from HD. Since most of your finish looks like it’s already worn off I’d prolly start with 60 grit. Hit everywhere you can with the Easy 8 then do your edging. Switch up to 80 grit and do it again. Vacuum the floor in between grits.
Now is where I switch over to the Hydra Sand. Of course you’ll need a floor buffer but HD has them too. I use a 5” palm sander to get right up to the edges and in the corners, other than that it’s buffer time until you’re done. I’d start with a 60 grit on the Hydra Sand and palm sander. Jump to 80 grit then 100 grit. If you like how things are lookin then you’re done sanding. I suppose you could take it up to 120 grit but that’s up to you. If you’re gonna stain the floor then you’ll want to take it up to 150 and you’ll have to water pop the floor before you apply stain. Just between you n me, do yourself a favor and don’t stain the floor. Dark floors show every single imperfection and you’ll likely have a few.
Did I mention dust containment? There’s gonna be dust. So much dust you’ll be pickin boogers next year from this job. The first sand n finish job I did was in my own house. I had fans in windows and put a cardboard box over the buffer to try and keep the dust down. I have dust containment and HEPA air scrubbers now. What do you have? Better to ask and come up with a plan now than when you’re in the middle of it and your wife is freaking out.
Finish. Water based? Oil based? What kinda time frame you got for this job. I’m gonna swamy this and say you want Bona Mega satin finish. It’s water based, easy as pie to apply and you can walk on it and recoat it in 2 to 3 hours. I’m gonna say 4 coats. First coat is a seal coat so you’ll end up with 3 solid coats when you’re all done.
After your first coat you’ll wanna feel the floor to see how smooth it is cus dust n crap gets stuck in the finish. A quick scuff with a screen will smooth things right out. Don’t scuff it too much, just enough to get the little tits off the floor and that’s it. Vacuum, tack and continue applying coats.