Get the abrasive maroon pads for your 175. Prevac and then use the shower feed with neutral cleaner to wet scrub the VCT.
It will gently remove the top layer or so. Don't do it dry, it takes too long and your pads won't last long.
Wet scrubbing means no dust or nasty chemicals and it is speedy and foolproof. However if the floor is trashed, just use stripper and hog it all up.