I recommend going to Sherwin-Williams and picking up a gallon of Gallery clearcoat in a 20 sheen. This is an almost exact match to the clearcoat we use on our doors (we use their industrial version of SW gallery, but it is the exact same formula from what I can tell) . Gallery is designed to be sprayed, so it’s not recommended for wiping or brushing. However, by using this material, you’ll have the ability to refinish the doors whenever needed.