1.   The chair stopped, and the hands directing it tightened on the controls until the knuckles turned white.

2.   One of our cats used a wall as a litter box, staining the paneling with urine and in some places turning it white.

3.   Q. I spilled antifreeze on my reddish vinyl porch floor, turning it white.

4.   Q. Why does Clorox turn things white?