5. Get Painting
You don’t normally need to use a primer on walls that have already been painted, so now ‘s the time to crack open your paint tin.
Stir your paint with the mixing stick and pour some into your roller tray. Use your medium-sized brush to paint the outer 10 centimetres of your wall, going over the edges of the masking tape. Use the roller to fill in the rest. The key to achieving a smooth, even finish is not to overload your brush or roller.
Leave the first coat to dry then, if needed, apply another. You may need a third coat if you’re going for a dramatic colour change.