Please, apply more strength upon cleaning the insides of the armoires. They're rather crusty.

He's a crusty old man.

I don't like crusty bread enough that your suggestion appeals to me.

“When you’re going to a pastry shop or a bakery, there is excitement, like 'let’s go get a treat or a crusty bread',” he says. “I don’t want to take away any of this experience. "

I like crusty rolls.