Thank you Huligar for your reply.
Yeah, it is definitely the
grout that stained the floor. I don't know how to post an image and my camera is lost anyway.
360' of honed 16"x16" tile badly stained sandstone, especially at the perimiter of each tile where the
grout was worked in.
When I installed the tile it was unsealed, and I got a few mortar spots on the tile that left white spots. I took a piece of scrap sandstone tile and rubbed the white spot out. (Not a great move, I know) I ended up sanding each spot with my hand held vibrating sander starting with 100, then 220 and ending with 380. This made the finish the same as the rest of the hone.
The wierd thing is, it looked great after sealing, but the
grout stains revealed a lot of mortar stains that were absolutely invisible to me, my wife who has a keen eye and is critical, and everyone else who saw the floor. It is my understanding that because I sealed these mortar stains into the floor, the only way to remove them is to resurface. After sealing, some machine marks became evident and I removed some of them with my hand held sander.
So now I'm thinking that the only way to make this floor look right is to resurface. The cabinets are not set and the baseboard is not installed. The tile is a between 7/16" and
1/2" thick.
Your input is greatly appreciated.
Joe
stained sandstone 
Linear Mode
