Smooth Exterior Stucco Finish . Exterior paint for stucco has four basic finishes: Bag of finish material that you would typically get from the manufacturer, that would roughly equate to: Smooth Sand Finish Exterior Stucco Yelp from www.yelp.com Fx australia has made every attempt to ensure that these colours and. Rough stucco was a popular look for both interiors and exterior of homes in the 1970s and 80s. Exterior stucco finish shall be applied by hand or machine application to a finished thickness of 1/16 to 1/8 inch.