Answer:
What Botox will do to your expression.
Built of metal or wood to divide. It will make us good neighbors, if you stay on your side. What is it?
It covers you, you lose it every day and you'd die without it.
You could do this to a motion, see it on a watch, or place this in a race.
This is a dead giveaway
I am your mother's brother's only brother in law. Who am I?