1.   I gave the floor a good scrub.

2.   The walls needed a good scrub.

3.   A good scrub brush and patience usually works.

4.   Jerusalem artichokes need no peeling, just a good scrub with a stiff vegetable brush.

5.   The theater as a whole will probably need a good scrub.

6.   You wanted to approach their offense with sandpaper and give it a good scrub.