If it's a full-thickness half- or three-quarter T&G it'll come back
nicely w/ a scraping.
If it's one of the very thin stick-on or similar products laid over a
substrate wall there may not be much aromatic left given.
Can't hurt to try, though.
Scraping w/ a wood scraper (_wood_ scraper for finishing, _not_ a paint
scraper type) is quicker and more effective than (hand) sanding.
In the 70's I lived in a building built in 1930 and every apartment
had a cedar closet. Of course it was made with full thickness cedear
wood, I don't know how thick that was.
It does seem like it might need something after all those years.
OTOH, I don't know how much it takes to scare the moths away, which is
the purpose, right?
I think I would leave the door shut for a couple days, then go inside
and close the door, and see if I could smell the cedar. I think if
you can smell it, then for sure the moths will.
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