The only one step product I can see here that would help is PAINT, and for a door with that degree of a mottled finish, you would need some prep work before the paint. If you want a natural wood finish, there is some work to be done there, IF you want a good outcome.
You ll have to decide if the suggested products are how you want to go?
I d start looking at this page.
Restor-A-Finish was primarily designed for interior use only
- therealSteveN
We sold a home we built, literally built, 9 years ago. Work for both of us was pretty much non stop, and there were many things I had to go back over to have the place look it's best. I've had been doing woodworking, construction, and remodeling as a side business for 45 years at that point, and knew our front door needed a LOT of attention. It was Maple, and had at one time been a thing of beauty.
Our Realtor was the person who convinced me of 2 things about that door.
1st it was the spot where every single prospective buyer was going to walk through. Once inside we had a huge home, and people tended to ramble once inside, but entry was right past this now hideous looking door.
2nd, he had a finishing guy who could do the work, quicker, and maybe cheaper than I could. I laughed at the cheaper part. It ended up costing me $300.00 for him to refinish that front door. I was looking at 400 in cost to buy the supplies I thought I needed.
We sold the place in 9 days, had 27 offers on it, and the buyer paid over 39K more than asking, and with no inspections. Sam, he's the Realtor said it was that 300 bux. I tend to believe him. It was when house sales were just starting to pick back up after the crunch. It was in a depressed county. Our sale was the single highest dollar home sale in that county in 83 months at $395,000.00 this is in Ohio, North of Dayton. That is a great property value in our region. Both before, and after the housing crash.
Front doors sell houses, make no mistake. If you have to ask what is best, you should be looking for the best pro in your area. I mean come on, Mahogany doors x 4, you do not live in a double wide.
I'll move away now, if you want to do the work yourself, sure go ahead. I'm just saying that is NOT a one step fix-em-up.