When we bought our house one of the rooms had been splatter painted, presumably by a 12 year old--there are huge drips all over the walls. We tried sanding the thousands of paint drips but after hours of trying with no luck we just painted over the drips and lived with it...it was the guest room after all.
Fast forward four years and now we are moving our daughter into that room and I do not just want to add another layer to the mess in there right now. Any tips on how to make the walls smooth again?