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You can use diluted paste to seal the wall.
Trad was to use Size which used to be animal skin glue - and has a distinct smell
😋
The diluted paste would still be water soluble though I guess, size would need heat to dilute
Alternatives are PVA or SBR.Caveat;
I haven’t done any papering for years (thank god).Edit; sealing the wall correctly is important, you want to be able to move the paper - so you do t want too much suction but you don’t want it totally sealed or the paste dries like a skin and will peel off.
I’d recommend Size. -
I'd use watered down PVA for that. More knowledgeable people may have a better option though.
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Have a look at Gardz, I'm not sure if it's designed to do what you want but it's similar.
Double lining is an option but you don't mention what type/weight of lining paper you're using.
As already mentioned the walls should be 'sized'. In this day and age that's normally with the same paste as you're using for the paper. There are a couple of different types of paste but I usually use it premixed and I don't dilute it for sizing.
It seems from your description that the paint didn't have enough time to dry properly, I've seen this happening with papering before, normally it's a light colour and doesn't permeate the paper. I always use a thick lining paper these days, the lighter stuff isn't worth the problems it can give you.
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absurdbird
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@ILb
Got away with yesterdays wallpapering nightmare as the good folk at Photowall are sending out a fresh set of paper foc.
Can anyone recommend something for sealing a newly painted wall to stop the paint from mixing with the paste again? Is a thin layer of paste applied first a good idea?