Its important to hire a licensed and insured painting contractor. Far too many painters in the bay area carry liability only and have an exemption for workers compensation.
The problem with this is if they have workers on site that do not have an exemption the property owner is liable if they get hurt on the job. It makes it very important to obtain a certificate of insurance from the contractor that you hire that shows both workers compensation and general liability insurance.
Contractors who dont have workers compensation on employees or sub contractors are in voilation of the law and put the property owner in jepoardy for lawsuits.