Buick CENTURY 1997 Manual page 258

from
the wheel bolts,
mounting surfaces and
spare wheel.
Rust or dirt on the wheel, or on the parts to
which it is fastened, can make the wheel nuts
become loose after a time. The wheel could come
off and cause an accident. When you change a
wheel, remove any rust or dirt from the places
where the wheel attaches to the vehicle.
In
an
emergency, you can use a cloth or
a
paper towel
to do this; but be sure to use
a
scraper or wire
brush later, if you need to, to get all the rust or
dirt off.