While it might feel instinctive to just pop open a tin of paint and get started, there are a few steps you should take beforehand that will make your decorating appear luxurious and well thought out. Experts at Toolstation suggest smoothing out the wall surface by applying filler to any cracks or blemishes. Ensure you allow an hour for this to dry before sanding down the surface. DIY enthusiasts can choose between a power sander or sandpaper, making sure the entire wall surface is covered.