To paint your walls you first need to prepare the walls so that the products stay on the wall. Apply a painter’s tape to the edge of the walls. If you are painting the interior walls then cover the floor with drop cloths so that your floor is protected. The paint will drip while painting the walls. You need to cover the floor to prevent any damage.
You need to first apply wall primer. You can use oil based primer for interior walls. Use appropriate brushes for applying the primer and the paints. Use roller brushes attached to a roller frame. Once you have applied the primer you need to allow the primer to dry for sometime.
Use paint thinner to clean the paint brushes. Fill a big bucket with the paint. Follow the instructions given on the paint container. Use the paint brushes to colour the walls. Allow your walls to dry overnight.