Call and ask your contractors these questions. Don't be afraid to ask questions. It is your money and home. I would ask for references and take a look at samples of their work (especially the low bidder). Make sure all are licensed and carry the required insurance. You don't want to get a bad stucco job, so do your homework first before selecting a contractor; which may not be one of these. Check with your local building department and local building exchange for more references on these and other contractors. Good luck.