A politician will about-face at the drop of a hat if he thinks there are votes in it.
When Luke heard the news, he did an abrupt about-face on the policy.
When he saw the police car, he about-faced and quickly walked away.
The new policy represents a complete about face from the old one.
... are going into retirement and dying. You will face problems in the aging of the population ...
... which is what happens when an engineering culture comes face to face ...