Re: Skim Coat Or Sand
It depends on what the wall was patched with whether or not you'll be able to sand it, I would give that a shot first. If you're lucky, it was patched with drywall compound and will be relatively easy to sand.
If a plaster or stucco mix was used, then you're in for some work. In this scenario I would first see if it can be scra-ped or sanded, if not, I've had good luck with an angle grinder to remove the worst of the lumps and bumps, then float with drywall topping compound.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!