Using a wax block to resist paint allows to easy distressing. For exact placement of distressed lines and edges press the wax along the edges where you would like to see the distressed antiquing effect between layers of paint. Anything that is applied on top of the waxed areas will easily distress without too much sanding!
You will notice this resist once you are giving your piece a light sanding at the end of your application of all layers of paint. The paint underneath the wax will remain in place, and any paint applied on top of the wax will come off effortlessly, allowing for the perfect distressed look.
This is a pure, 100% natural beeswax block.
Watch here for a video demo on using different methods for finishing your painted furniture project, including the use of a wax block or puck for resisting between layers of paint: