We have been in this house in the central California valley about 27 years. Over that time I have brushed on numerous coats of Minwax spar varnish on the outside of our natural wood front door. Once about 8 years ago I hit it with my random orbital sander to take off a layer or two. It has looked ok up until we and our neighbors across the street both had to cut down trees two years ago for various reasons. Now we get harsh morning sun on the door for hours. As a result, it is now peeling from all the coats of varnish I guess. It is a large oversize door with beautiful natural wood inside. I don't want to replace it or paint it on the outside if I can avoid it. Here are two pics of outside and two of inside. My Q is, what would you do to restore it outside? Use some kind of stripper or sand it down to wood or....? Randy