Hi guys and gals. The front of my victorian semi is looking a bit rough and ready. The paint is starting to peel and i have been putting it off. Cant do it anymore it needs painting. Obviously i need to wirebrush and scrape all the old paint off and then sand down the rough edges etc. But before i paint im guessing i need to use something on the bald patches prior to painting so that the new paint adheres properly and also so it blends in with the rest of the paint. its a tall victoria property with some kind of flat Rendered wall. Any ideas?? Never done this before so dont want to make it look rubbish. Thanks