Re: On to the front door!
Is it oak under the alligatored varnish?
You need a paint sc****r, some liquid stripper like Kutzit, and maybe a cabinet sc****r once you see how much sun damage there is to the wood.
The worst of the alligator effect can be sc****d with a sharp paint sc****r; do not yet try to get to the bare wood, let the chemical do that. If you place a dropcloth down under the door, mask off the surrounding area, and keep changing some newspaper on top of the dropcloth, you could strip it in place. Probably better to lay it flat on sawhorses, though. It won't take more than a couple hours to strip the old varnish anyway.
Some areas may be more sun-damaged than others; then you can decide whether to mask the damage with a dark stain, or use the cabinet sc****r (an acquired skill with a learning curve) to restore an original lighter appearance. Then sand, stain(?) and topcoat. Usually spar varnish, especially if it sees sunlight.
Remove not the ancient landmark, which your fathers have set.