Originally Posted by DyerWolf
ETA: I went back in to look at what I'd done today and noticed streaking - I can see the trowell lines I made through the tile. Will this go away? I'm using a ceramic floor tile I bought at the Tile Shop.
That's scarry. I'm not familiar with "Tile Shop"; is it some type of outlet store with discountd factory seconds, or do you have first grade product. I'd be pretty skeptical of putting any tile on a floor where the tile and glaze was thin enough to allow the trowel lines to show through. Are you sure you have a ceramic and not a glass tile?
Some brands of thinset need to have a little more powder than the recommended amount to give it enough body to support the tile without sagging, particulary with large tiles.