industrial applications of hair spray?

This question was rejected because it was primarily about inventory and had a customer service complaint.

"Why can't I purchase White Rain hairspray online?

We use this in an industrial application. I buy at the Super Wal-Mart but they do not keep sufficient stock. I have asked the manager in the department to order cases each month but they have not done this. I would buy two cases a month but end up driving from store to store to find it."

All I find myself thinking is... what industrial application does this person need two cases of hairspray for? Please make your suggestions in the comments below.