Yeah I saw people saying to do it but there wasn’t really anything to sand - all I’d be doing is making oily wood dust to stick to things. Unless that’s the point!
Yes that is the point. The fine dust (500 grit or even steel wool) in combination with the oil brings it to a high sheen. Using pure oil is a time consuming process but it's rewarding in the end.
it will eventually dry. it can take 1-2 more weeks.
sanding lightly between coats is a thing.