It's been thoroughly sanded, primed, and maybe painted. This is the level of finish once you just need to paint the walls. This end will work for even very shiny paints mainly because it is smooth without ridges or potential imperfections. Sand the dried compound right until It is smooth https://www.social-bookmarking.org/en/expert-drywall-solutions-for-every-project-from-basement-to-new-construction