Stand up shower. 2"+ square tiles. Tiles are a mixed grey. Outside shower also tiled on floor and half walls. Grout is a darker grey...called natural grey from the grout charts I've looked at. This is a HUD wreck. Shower was covered with soap scum and it's been sitting a long time...years. I scrubbed the shit out of it with Comet spray bath/tile cleaner. Overall it cleaned it up good. Grout is nice and dark when it's wet. Dries light. Very pale grey. Looks like it was still loaded with soap scum. But toss a little water on it and it immediately goes back dark like it originally was (probably). The fact that it does this is either a sign of hope or no hope. Just not sure which. Used a nylon brush, a greenie pad and even tried on one inconspicuous spot a brass wire brush with the cleaner.
Except for a couple of small areas where I have to remove some tiles, fix backing then replace the tiles, the other tiles are sound - floor and wall.
I plan on stop by a tile store tomorrow and see what they have to say for a solution...besides regrout the whole damn thing.
Anyone have any similar experience or input?