Supermany thnks, all!
I guess the BLO curing goes faster/deeper if I keep the wood outside (around 27-30C, high humidity) in dappled shade?
I have kept the bits indoors, 19 C, very low humidity.
My knife handle hobby, I always kept the knifes indoors, as I did not want the blades to rust.
( Carbon rusts quicker than you can polish it, S/s gets rust spots in a few days)