im going to put some glue down Karndean flooring in a small hallway. I've used it before but only on plywood, this time it's on concrete. What the normal procedure? I have a tub of Karndean skim coat which I assume is their self levelling compound? Is it best to clean floor, then pva with a diluted? Mix? Then mix skim coat and trowel on? There are a few deep holes that have broken down near door, is it best to put a little concrete repair in these before skimming? I think the Karndean skim coat is up to 3mm? Thanks