http://www.richardgroskopf.com/paint-texture/
how do you remove texture (paint) from a wall?
If the wall has high quality paint on it, it will be very difficult to sand. It will be easier to apply joint compound(sheetrock mud) over it with a 10″- 12″ trowel and then sand it smooth. If it is very rough, it may take 2- 3 coats. If it has glossy paint on it, scuff it with sandpaper or a wire brush to ensure good adheasion, and if it is very rough, scrape it first to remove what you can.
Creating Texture: Large Painting Knives & Acrylic Gels
Here's my opinion: artistic talent is largely learned. Most of the so-called experts will argue this statement, of course. They’ll proclaim that artistic oil painting techniques are only in the grasp of those rare individuals that are born with a mysteriously God-like ability to create art. Being lowly mortals, we should never even try to understand art let alone try to create it. Give me a break! Click here For the rest of the story: Free Painting Lesson