I have a solid wood exterior door, that I had stained and finished by the maker. I was looking for a way to prolong and protect the finish. I thought about waxing the door (especially the exterior side). Any have any suggestions on this ? I thought just a spray automotive wax would do the trick.
You mention the door is "finished" by the manufacturer. Can you tell me what type of finish ? Most exterior doors that are stained can be sealed with a product such as spar varnish, or marine grade epoxy. Seikens makes some very good marine sealers that work great on exterior wood doors exposed to direct sunlight. If your door is shaded and protected by a storm door, than it can be sealed with urethane, however urethane is not recommended for direct exposure to the elements or direct sunlight.
Look for a automotive, paste wax, especially one that contains a LARGE amount of natural waxes, i.e. carnauba ! ( "Blue Coral" )
Follow application instructions on can ....