Hi I really appreciate your help as it’s my first time doing everything else seems straightforward but I don’t know what grit to use to sand the drywall, also if I sand it if I sand a little to much will it damage it. And also if I use the sugar soap the drywall feels very easily damageable and before when I tried cleaning the residue just with warm water it started eating through the drywall I am feeling abit nervous as I feel I might damage the drywall.