To enable an old door with cracked paint to spread a stylish atmosphere again, it has to be renovated. You can easily do this yourself on solid wood doors.1
Unhinge the door and lay it horizontally on two trestles. If you want to strip the paint yourself – only outdoors of course –, you must wear rubber gloves and a face mask. Apply the paint remover with a wide paintbrush and leave it to soak in for half an hour (you can also take the door to a commercial paint stripping service, which will also take care of the disposal of varnish and paint remover).2
Now you can push off the softened paint using a scraper – repeating the process until the original wooden structure is uncovered. Tip: On doors with decorated or profiled surfaces, it is better to use steel wool (but never on oak wood!) or a clean wire brush.3
Sand down the door with an orbital sander.