Hi all,
Just some random thoughts about woodwork and all in damaged buildings...
One thing to remember is that it's the outside of your wood which weathers.
By all means stain your planks to look more like beech or birch or stout hearted oak or whatever. It's long been a real world practice to stain cheaper timber to look like more expensive wood - no reason not to replicate it in scale.
Floors are often varnished or polished, scuffed and worn. Ceiling timbers get dusty and cobwebbed, but don't wear. Also, remember that 'hidden' structural timber can "sometimes" be put together with a lower quality of workmanship - I speak not as a carpenter, but as someone who has demolished a few buildings...

Timber that has been attached to another piece (think ceiling trusses) will not weather or age as much where the two pieces rest together, but may accumulate a lot of gunge along the edges of their contact area.
Paint flakes, peels, cracks and weathers. There are undercoats and primers and, gee honey, I don't like that particular shade of chartreuse, can't you just paint over it with this carmine...
Dry rot, wet rot, lichen, moss, woodworm, death watch beetle, borer, termites.
Oh, yeah, finally...
Once you've made your floor and weathered it and gone and broken it into a thousand pieces for inclusion as groundwork in that ruined chateau, don't go around weathering the
exposed edges, beyond what might be called 'collateral' weathering - dust, water damage, fire, soot, etc. Broken wood exposes the unweathered core.
This last point also applies to stone, concrete and brick construction of course...
Okay, end of two euros worth...
acav out