I don't oil unless it is a definite request, one I can't wiggle out of. This doesn't go far in answering the query. I just wanted to express there are shops not oiling and end sealing the timber as a regular step in the process. I have been know to hit a few spots with an orbital sander, ( that is right Will T.), like a grease smudge or a rubber tire mark from the fork lift, and I do have frames with such marks still on them. This approach puts me in a different class of framing, one where I would rather be, a personal approach, a signature, the yin and yang of framing.
Tim