Babbitt’s party politely edged through them and into the whitewashed room, at the front of which was a dais with a red-plush throne and a pine altar painted watery blue, as used nightly by the Grand Masters and Supreme Potentates of innumerable lodges.
For half an hour Babbitt sat looking at a calendar and a clock on a whitewashed wall.
There are no more uses of "whitewash" in the book.
Show samples from other sources
One could whitewash all he pleased, and put up comic neon signs, but the aged timbers stood strong under their additional burden.
Harper Lee -- Go Set a Watchman
For ten bucks, you could graffiti your name on Tom Sawyer’s whitewashed fence, but there were few takers.