Yes you must remove any furniture wax when redoing furniture as no paint, varnish or stain will stick to wax. There are wax strippers on the market which can be purchased at hardware stores. You are going to have to put a bit of elbow grease in to take off the wax surface. Dear Melissa You have a very common problem, but there are many things that you can do with a flat hollow-core door. You can create panels using paint which is an illusion.
Recessed panels are the easiest.
Just measure out rectangular shapes in proportion to the size of the door. Each edge of the panel shoud be about an inch deep. Tape off the edge of the panel on the inside and the outside with masking tape. If the base colour of your door is a pale blue, then add a little white to it to make it a little lighter and a little black to make it a shade darker. You now have three shades of the same colour.