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- 24 Oct 2025
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Thinking about redecorating the bedroom.
It has an old lathe and plaster ceiling which is in quite nice condition considering it's age. No snagging, nice, stable, zero damage.
I remember about 15 years ago it was an absolute nightmare to paint. As soon as it got hit with water based emulsion, the surface become unstable and the paint started sticking to the roller and was chalky.
I bodged all those years ago by hit and run. Just hit the areas that had peeled with thickish layer of paint one pass.
Once it had time to dry the ceiling has had zero problems. No peeling paint, and has lasted 15 years with no visible issues.
So I'm thinking it's an old product that's been used that gets re activated by water based paints and becomes unstable and chalky.
My thinking is.
1. Hit the ceiling with it with a quick pass of zinzaer guardz, let it penetrate and help stabilise the ceiling (I already have half a tin of this laying around). Leave it to dry properly.
2. If I don't encounter issues. Possibly a quick pass of zinzaer BIN (the shellac one), just so I'm not reactivating anything with water.
3. Hopefully this would give me a good barrier and I could just treat as a normal ceiling.
I know I could just overboard. But like I said the lathe and plaster is in good condition. So rather than being up on ladders boarding if I could make the existing surface problem free with a pass or two of different products it's the route i'd like to take.
Obviously if it ends in tears at any point and the paint starts turning to sludge, I'll just bite the bullet and overboard.
Does my plan sound sensible?
Anyone had success making a surface like this good for taking water based emulsions?
It has an old lathe and plaster ceiling which is in quite nice condition considering it's age. No snagging, nice, stable, zero damage.
I remember about 15 years ago it was an absolute nightmare to paint. As soon as it got hit with water based emulsion, the surface become unstable and the paint started sticking to the roller and was chalky.
I bodged all those years ago by hit and run. Just hit the areas that had peeled with thickish layer of paint one pass.
Once it had time to dry the ceiling has had zero problems. No peeling paint, and has lasted 15 years with no visible issues.
So I'm thinking it's an old product that's been used that gets re activated by water based paints and becomes unstable and chalky.
My thinking is.
1. Hit the ceiling with it with a quick pass of zinzaer guardz, let it penetrate and help stabilise the ceiling (I already have half a tin of this laying around). Leave it to dry properly.
2. If I don't encounter issues. Possibly a quick pass of zinzaer BIN (the shellac one), just so I'm not reactivating anything with water.
3. Hopefully this would give me a good barrier and I could just treat as a normal ceiling.
I know I could just overboard. But like I said the lathe and plaster is in good condition. So rather than being up on ladders boarding if I could make the existing surface problem free with a pass or two of different products it's the route i'd like to take.
Obviously if it ends in tears at any point and the paint starts turning to sludge, I'll just bite the bullet and overboard.
Does my plan sound sensible?
Anyone had success making a surface like this good for taking water based emulsions?
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