Put the second coat of teak oil on tonight.
Most of the wood looked good, but there were a couple of spots on one hand rail and one hatch slide where the teak had absorbed all the oil and left the surface looking like I hadn't put anything on. Not surprised, after 30 years I suppose the wood was pretty thirsty.
I waited 20 minutes again then rubbed the oil off. The wood is pretty dark now, so I think it's about done. Now I just need to re-attach them.