Last week I helped a lady with some small plastering needs. She has a side entrance which is directly under her bathroom and at some point there was a leak and the water cracked the plaster in the doorway below.
I removed the old plaster completely, prepared the surface ready for a new plaster and skimmed the doorway. This took me about two hours including cleaning up. Customer was very happy with the result and I was off to the next job.
Screw it! 