Situation (as if you'd not already guessed) :
Extension built about 10 years ago (by previous house owner). Paint appears to have been applied to fresh plaster without a mist coat. So with very little provocation it peels off. And now we're re-decorating - doing some alterations (extra sockets etc) along the way.
It's not going to be practical to peel all the old paint off, but there's areas missing now (especially where I've been hacking out the wall for cables etc. Other than generally sanding things down as best we can, any other suggestions ?
The biggest problem with sanding (I'm using a belt sander) is that it tends to pull up the edges of what's left rather than feather it off. But there's areas we need to sand down to get the wall flat as the plastering "isn't very good" and there's lots of "blebs" from him having tried to work the plaster while still too wet.
Extension built about 10 years ago (by previous house owner). Paint appears to have been applied to fresh plaster without a mist coat. So with very little provocation it peels off. And now we're re-decorating - doing some alterations (extra sockets etc) along the way.
It's not going to be practical to peel all the old paint off, but there's areas missing now (especially where I've been hacking out the wall for cables etc. Other than generally sanding things down as best we can, any other suggestions ?
The biggest problem with sanding (I'm using a belt sander) is that it tends to pull up the edges of what's left rather than feather it off. But there's areas we need to sand down to get the wall flat as the plastering "isn't very good" and there's lots of "blebs" from him having tried to work the plaster while still too wet.