I am getting close to finishing my new barn in NH.
The siding is 1x6 shiplap pine, sawn on my property.
I would like to protect/preserve the wood siding in its natural color.
You can try to achieve that, but the Sun and the weather will not let this happen. Best you can do is hold it off. Use the best clear wood preservative you can buy with a UV protector built in.
Consumer Reports did a comparison recently.