Hi, I could really do with some simple advice on what I need to paint a bedroom wall. Do I need to do anything before I put the paint on? Should I buy a roller, or a set of brushes? Anything else i should think of? What is the minimum I need to clean everything afterwards? Also, my son would like a red wall, but the samples I have tried (b&q own) have been a bit patchy. Any recommendations? I am a complete novice, so please keep it simple!! Any tips would also be amazing!