Plastering Tip #2: Get your plaster mix just right. 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. Can leave til next day if big area for instance and then wet down or use pva on it. Blue Grit. I would prime the walls AFTER applying your repairs or skim coat and that sanding. This helps bond the plaster to the surface. Its called blue grit. 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. Sand the walls with a higher grit than 80g, like 150g before priming to etch or scratch the old paint as a bonding help. To get a complete breakdown on PVA before plastering then check out this article! As an amatuer I never even attempt it. I'd neat PVA the lot and allow to go tacky before skimming. You'll prob need to do that over two applications as its quite deep. use bonding; wait to dry –1-2 hours? Hope this has been of help to you Bonding about 2-3 hours, but some do leave it to following day before skimming depends on size of area. 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 . The plasterer should brief you. There is absolutely NO need for PVA when skimming over bonding the same day or the next day. 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. If skimming over straight after set then skim straight onto. Can skim over bonding after a couple of hours or so which should be enough time for it to set. After a couple of applications go over the bricks with neat PVA and then start building the gap up with bonding coat. And don't listen to anyone who tells you to prime your new plaster with PVA. 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. 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. Prime bonding with PVA dilute 4 to one, allow to go tackey, then skim. 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. 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? Not all pro plasterers are good at skimming walls. dont quite understand what you mean by using pva over the bonding,pva is the bonding eh ?never used bonding coat myself . Bonding about 2-3 hours, but some do leave it to following day before skimming depends on size of area. There is another product you can use. use bonding; wait to dry --1-2 hours? PVA is good but there is a better product. Bonding about 2-3 hours, but some do leave it to following day before skimming depends on size of area. 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. Do you need to PVA bonding before skimming? So if all the paper is off, fill any deep holes, and leave the rest to the plasterer. Prime bonding with PVA dilute 4 to one, allow to go tackey, then skim. 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