Inverness has several shops which sell waxed jackets. They sell models that are more for working purposes rather than the more style-oriented ones available in the US. If any place in the world is right for a Barbour or similar brands, it is Scotland.
Gore-tex made waxed clothing obsolete, more or less, but people still like it. What is not widely-known is that Gore-Tex, over time, loses its waterproofing effect and you have to replace the item. Waxed cotton and waxed canvas can be re-proofed. I have waxed canvas Filson hunting pants, waxed canvas hunting brush chaps, a Barbour, maybe something else too. Damn things are heavy to wear compared to Gore Tex.
If these things get too dirty or muddy on the outside, you just brush then off or hose it off with cold water. But what about when the lining gets sweaty and smelly? Ideally it won't because of the other stuff you are wearing, but if you want to clean it out, how?
I read up on the topic. The only way to do it that protects the wax is to hose down the lining with cold water. No soap, etc - just cold water. Let it soak, then hose it again and let it air-dry. That's all you can do until the jacket needs re-proofing, at which time the company cleans the lining too.