Uneven walls can be caused by a number of things like cracks or previous wall treatments such as wallpaper that just won't come off. Painting uneven walls can be done a few ways in order to get a nice uniform look. If you are dealing with uneven walls, learning some techniques for painting them can help you get a nice end result for your walls.
Select two shades of one colour to paint walls, having a dark shade and lighter shade of the same colour. To ensure shades will work together head to your local paint store and browse their swatches and stick to two shades on the same swatch.
Select a shade to be the prominent one based on whether you would like a darker look on walls or a lighter one. If you are painting uneven walls in a small space you should stick with the lighter shade as your prominent shade.
Clean walls with a multipurpose cleaner and rag and fill in any large cracks or holes with latex spackle prior to painting. Allow spackle to dry according to the manufacturer's directions.
Paint walls with a paint or roller brush in the shade you selected to be the less dominant. For example, if you want walls to be darker, then you will first paint them in the lighter shade you selected. Allow paint to dry for three hours.
Sponge paint the walls with the other shade you selected. Dip the sponge in paint and begin dabbing the walls with it quickly over one section and work your way across walls. You want to sponge so that the shade below is still visible through some of the paint.
Allow paint to dry and sponge any sparse areas as needed until you have the desired sponge-textured affect. Allow all paint to dry completely.
Clean walls and wipe away any debris, as well as pick and scrape away any loose paint or wallpaper hanging from walls.
Mix up your drywall joint compound in a large pan or bucket when you are ready to start covering walls.
Use your wide scraping knife and collect a heap of compound onto it, then apply to one section of the wall and begin smoothing the compound out onto the wall in downward strokes until it is a thin, smooth layer. Do this in sections until entire wall is covered.
Allow compound to dry overnight, and repeat with another layer. Allow this new layer to dry overnight and then paint walls whatever colour you've selected and allow paint to dry.