The next step is to prepare the bare stucco for the paint. You will need to let your surfaces dry for at least 48 hours after water-blasting. To prep the stucco for maximum adhesion, the best method is to add a product called E-B Emulsa-Bond to the first coat of paint.f you own a home whose stucco finish siding has been painted, there will probably come a point when you want to repaint, and have to remove the existing paint entirely.