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PostPosted: Tue Apr 10, 2018 10:27 am 
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I was stripping off woodchip wallpaper from the 1970s-built extension in my new house last night.

Underneath was good plasterwork, but some of the plaster was covered in the brown stuff you can see in the photo.

The brown stuff is very smooth, very hard to chip off initially, but running the steamer over it, some of it starts to turn stretchy and peely, a bit like if you cover your hand in PVA and let it dry.

But it doesn't cover the entire wall and is a horrible colour, so makes me think that it can't be a previous owner decided to paint the whole wall in it. Other adjacent walls don't have any of this on it.

Any idea what's going on here? and what it is? and how is best to remove it?

Many thanks!
Rob


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PostPosted: Tue Apr 10, 2018 5:06 pm 
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Vinyl silk


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PostPosted: Tue Apr 10, 2018 5:42 pm 
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spottie wrote:
Vinyl silk

Quite likely, a mist coat / primer never applied to the plaster so either they stripped the easy stuff before decorating, or it simply most came off with the woodchip.


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PostPosted: Wed Apr 11, 2018 2:28 pm 
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Thanks guys!

Reckon I can paint over this without stripping it all off (mist coat on the bare plaster first) so that there isn't an obvious difference/join between the vinyl'd areas and the bare plaster areas?


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PostPosted: Wed Apr 11, 2018 4:20 pm 
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At least feather the edge in with sandpaper before painting it is amazing how a paint edge can show through on the finish coat. :thumbleft:


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PostPosted: Thu Apr 12, 2018 12:31 pm 
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Quote:
The brown stuff is very smooth, very hard to chip off initially, but running the steamer over it, some of it starts to turn stretchy and peely, a bit like if you cover your hand in PVA and let it dry.


If it feels like PVA then it is likely to be PVA. Plasterers and painters used to cover new plaster with a PVA solution because they thought it was the best thing to do but it is one of the worst things you can do! Have a look at the pinned post on this forum about PVA.

Quote:
Reckon I can paint over this without stripping it all off


Not if you want it to look good and last a reasonable amount of time.

That stuff needs to come off or be covered properly (lining paper is probably the easiest option) before you paint.


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