I've copied and pasted something I saw on the internet. It describes an easy way to get an oxidised look (no idea what it will look like). Might be worth a try, and i'll give it a try as seems very simple. I suppose you could even combine it with a distressed finish or whatever?
Oxidation
To make your new wood look old and gray, you can oxidize it. Fill a glass mason jar with vinegar and add bits and pieces of very fine steel wool. Let the vinegar sit with the lid on for 1-2 days or more. The vinegar and steel wool will combine to create an iron based solution. After the vinegar has soaked, boil 1/2 cup of water in another jar and add 2 tea bags. In a well ventilated area, "paint" your wood with the tea and let it dry. After the tea is dry, "paint" your wood with the vinegar mixture. The wood will transform over the next 5 minutes or so. After the vinegar mixture is completely dry, lightly sand the surface with 220 grit sandpaper and cover with a finishing wax or tung oil to protect the finish.
Oxidised Wood Look
- David McCormack
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Re: Oxidised Wood Look
Thanks for posting that, looks interesting. Some examples on google images.
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Oliver Hardy.
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Oliver Hardy.
https://www.instagram.com/davidaustinmccormack/
Re: Oxidised Wood Look
I've heard variations of that recipe but never tried it. I sounds good. Must have a go....... 

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Re: Oxidised Wood Look
The last weathered wood frame I had to make i I used some timbers that were outside my workshop, I may have to try this.