Pin bubbles

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air -suction - small bubbles I know them as "blebs" sometimes you can hear , a similar noise to rice crispies , this is suction & creates "blebs" - leave them they go , MT Blister Brush are good to rid these also
 
Anorth said:
Why isit sometimes i get little pin bubbles appearing? Isit because the first coat has gone off to much?
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You need to be clear on the difference between setting and drying, high suction backgrounds can result in blisters as can overworking the wall before it is ready, good timing the cure.

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i get a lot of these f@ckers reskimming over artex....PVA .leave to soak n seal ..PVA again leave til tacky then skim seems to cure them
 
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