Do you have to try and do-it-yourself or hire a drywall contractor? Utility-Most partitions and ceilings could have standard grey sheetrock. Once more after the third coat dries, very flippantly sand the restore for the final time to assure a completely smooth completed area. Step four: coating the patch with drywall compound (mud). Well, that is about it for drywall restore.
If not, apply some more drywall mud to even the wall surfaces. It will rough up the drywall allowing the paper to fray and requiring more mud to seal the rough surface. When the paint primer is dry, apply …