After sanding, remove the dust with a tack cloth and apply three coats of polyurethane finish, sanding between coats with a #00 steel wool. After that, buff the surface with a piece of cardboard.
Polyurethane will soak into and adhere to the grout, but glazed tile is generally non-porous. The polyurethane may initially stick to the tile, but it will soon peel off.
You shouldn’t have to use string to tie up your rib roast unless the bones have already been cut off, and if that’s the case, get a different roast, as...
You keep going. Motivation is key, as if you allow your body to stop, it will just become even harder. Since it's about 1/2 a mile, it is not recommended...