I've visited with a potential customer at his home in Baton Rouge who is interested in flattening his 4 yr old travertine floor that was very poorly installed. There is lippage of varying thickness everywhere throughout. It totals roughly 2000 sq ft downstairs, and 300 sq ft upstairs in a master bathroom. From the pictures you can see multiple types and colors of stone and stone designs downstairs, and there are glass tiles embedded in the installation upstairs. Is there any potential problems flattening with the multiple stones downstairs? How would you recommend handling the glass tiles while grinding and polishing upstairs? What product is best to fill the opened pores after grinding? I appreciate the great advice from many of you before on flattening polished marble, but I don't know if all the same techniques apply in flattening travertine. I remember during my training where John and I visited a flattening job like this one he had going in Melbourne, FL, so I'm not completely unfamiliar with procedure, but I'm not fully confident with timing and pricing this one. All advice on how to approach and price this one would be appreciated. I'd like to provide as accurate a quote as possible as he's very much interested in restoration rather than replacement. Thanks very much in advance.