Hi, I've a few cracks in, and several small, round chunks about to fall out of, my plaster walls and ceilings. I want to fix them without replastering and repainting the entire wall, ceiling or room. Any top tips? My house is wall to ceiling white matt. I'd also welcome any explanations for the small, round chunks. They are about the size of a 50p coin and mostly appear on the ceiling very near the join with the wall. Weirdly none have fallen out as yet. Hard to describe but it looks like someone has got a teaspoon and scooped out the plaster, then stick it back in again (I've quizzed my wife and she denies doing this, so we can rule this out as the explanation). Thanks, Chillaxed