They look incredible!
Note - Teak from SE Asia (real teak) is dark brown like this
Silver Ash, also called Australian Teak or Australian Maple is Flindersia and no relation to ash, teak or maple. Queensland Maple is what I make all my guitar necks from though, love the pink and yellow streaks.
Edit, forgot to get to the point lol.
Flindersia has a more open pore structure and can soak up plenty of oil. This is a teak ‘herb grinder’ that’s been in use for 25 years with no polishing and a Flindersia uke neck that’s had 2 coats of stain and 2 coats of oil, gets rubbed with fresh oil every 6 months or so.