How long? Cleaning it about 6 hours with one helper; son in pics. Color sealing took another 8, with son and daughter. Some of this time was learning curve. Third cleaning and cs job I've done. The other two were real small. So it took us a while to dial in the particulars for this job. I'm thinking if I could do a similar job in 25% less time. Everything from cord management to how you handle the toothbrush for cs's makes a difference. Half way through the cs part my son pulled a the wheel cart off a garbage can. His productivity went up right away. Flood method? Not sure what you mean Mike. I'm guessing you mean spray, scrub, grout lines, flood and vac. Didn't go that route. Maybe give it a try next time. The dirt didn't stay suspended too long with either the CleanCraft product or the water from the steam cleaner. Soon as it dried, it stuck, so finding the balance of steps in the process was part of the trick.
Next month I have a burger joint lined up for several hundred feet of T & G and several hundred in carpet. Any thoughts on more powerful stuff than Clean Craft T & G? They might go with color seal, but I might steer them toward a maintenance program instead.
Probably the most important lesson; don't run out of brass detail brushes! I ordered a bunch today. Nylon is fine, but much slower. As long as the tile wont get messed up, go with the brass.