I have a very old wooden plank floor - probably over 100 years old. The wood
is just planks, nothing special but SWMBO likes it, bumps, holes and all.

I've sanded it to clean it up and want to give some sort of protection but
NOT a gloss finish.

Can I just use a light stain or does it have to be floor varnish - or have I
missed something about floor protection?

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Mark BR