This might sound a little strange, and I haven't actually tried it, but what if you apply the oil to a WARM (not hot) pan and let it get into every crevice, and then put the pan into a sink full of very hot water?
I would think that the hot water would lift away any excess oil from the crevices.
Then the water would steam off when the pan was put into the oven to season.
Just a stray, possibly crazy thought running in my head.