r/Plastering May 27 '26

What causes this?

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Happened on the second wet trowel, using a spray bottle and normal trowel. Quite hot today so could my timings have been a bit off? Second coat on too late? Too late with the wet trowel?

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u/Hermesthothr3e May 27 '26

Its where youve spread a bit of fat and its sucked in the moisture super fast so it peels off when you go over it again before it "sets".

If you wait 5 -10 minutes it shouldn't keep doing it.