Blue Grit. Not all pro plasterers are good at skimming walls. A top tip is to test the surface with your hand - if the mixture still feels wet then you need to wait a little while, if the and when the surface feels just tacky is the ideal time to start your first skim coat of plaster. in my experience some backgrounds need a few coats of bonding.apply the pva and leave for five min,if it goes dry quickly,apply another coat.idealy the pva should be tacky to the touch before applying the plaster. So if all the paper is off, fill any deep holes, and leave the rest to the plasterer. New plaster will not need pva prior to skimmimg And as for your artex might be a good idea to bond that, just to stablise any loose or defective areas . As an amatuer I never even attempt it. use bonding; wait to dry --1-2 hours? Its called blue grit. You dont need to pva plaster board,Only on high suction walls and for over skimming its best to pva day before and 2nd coat just before skimming, let it go tacky before skimming, dont let 2nd coat dry out before skimming. If you’re starting out (which I assume you are), then I’d always recommend that you use 2 coats of PVA- it makes skimming so much easier. Bonding about 2-3 hours, but some do leave it to following day before skimming depends on size of area. You'll have to PVA the ceiling and start from scratch - reapplying the 1st Coat as the 2nd coat needs to be applied to a firm but pliable 1st coat. use bonding; wait to dry –1-2 hours? If skimming over straight after set then skim straight onto. Hope this has been of help to you There is another product you can use. Sand the walls with a higher grit than 80g, like 150g before priming to etch or scratch the old paint as a bonding help. Prime bonding with PVA dilute 4 to one, allow to go tackey, then skim. Prime bonding with PVA dilute 4 to one, allow to go tackey, then skim. Unless you really need to skim coat an entire wall, it seems you just want to patch and smooth a wall or two before painting, yes? Do you need to PVA bonding before skimming? PVA is good but there is a better product. I'd neat PVA the lot and allow to go tacky before skimming. Hopefully you had time to flatten any lumps or ridges out before you put the kids to bed - if not they will need sorting before you re-do. To get a complete breakdown on PVA before plastering then check out this article! Can leave til next day if big area for instance and then wet down or use pva on it. And don't listen to anyone who tells you to prime your new plaster with PVA. dont quite understand what you mean by using pva over the bonding,pva is the bonding eh ?never used bonding coat myself . After a couple of applications go over the bricks with neat PVA and then start building the gap up with bonding coat. I would prime the walls AFTER applying your repairs or skim coat and that sanding. Bonding about 2-3 hours, but some do leave it to following day before skimming depends on size of area. There is absolutely NO need for PVA when skimming over bonding the same day or the next day. Many will apply PVA but they will want to do it their way. Bonding about 2-3 hours, but some do leave it to following day before skimming depends on size of area. The plasterer should brief you. There is absolutely NO need for PVA when skimming over bonding the same day or the next day. This helps bond the plaster to the surface. You'll prob need to do that over two applications as its quite deep. Plastering Tip #2: Get your plaster mix just right. Can skim over bonding after a couple of hours or so which should be enough time for it to set. Skimming over straight after set then skim do that over two applications as quite. 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