I DO NOT RECOMMEND THIS AS A HOBBY!
The end of my garden is a large breeze block garage. To try and make it look a bit nicer we have recently had some doors put on it. This weekend I decided to give it a lick of paint. No one warned me about painting breeze block!
It was so boring and I have a blister on my painting finger, I'm grateful I don't have to do that too often.
See the before and after pics. My plan was to sand and paint the wood at the top as well but rain stopped my playing :)