Sand Exposed Fibers and Rough Areas

rough kind of like sandpaper a little bit cuz there's so much exposed fiber and they're going to stand up what I'm going to do is just hit it with a sanding block it'll knock that down really fast if I have a lot to do I can just use my 3x4 sand or if you just paint over that without knocking them down you'll definitely see a difference in texture look how thick this stuff is so it hangs super well doesn't run in