Hi, I'm looking for a bit of advice, we have just had our house rewired and looking to have it skimmed, ceilings and walls, we've had 3 plasterers quote for the job and chose one. He arrived to start on Friday but has now decided that the black mortar cannot be skimmed over and must be hacked off, he has recommended dot and dab. It's a 1930s brick built semi. We didn't want to go to the extreme of hacking it all off. Any body have any advice? Alternative solutions? Thank you.