I've seen it all this last few years. Blisters in the finished plasterwork, trowel marks galore, cracked beads, artex showing through the finish. All done on the cheap!!! Just last week a guy who knocked back my quote because he found a cheaper spread, called me and asked me to price more work. I said, hang on mate, didn't you manage to get somebody else who was cheaper? He said yes but it turned out to be a disaster. So i went down to his house and he showed me what the so called plasterer had done. It really couldn't have been any worse. No beads on any of the angles, brush marks and plaster not even trowelled in places. He was not happy. I've quoted him for his living room. He wants a really good finish. So he's saving up to get it done properly and he'll "be in touch" ......
