Hi Andrew, this has been discussed somewhere but at my age remembering is a chore in itself. If I'm not mistaken Mica said not to oil the polyester finish but to use a guitar polish on it, such as the Alembic Supreme Polish. This is what I'm putting on my Epic. Other than that I just wipe it down after playing.
Again I'm relying on memory here, always a tricky proposition, but isn't your Epic a '97? How is your brass looking? The brass on my '94 has dulled nicely but has a few pits in it. I guess from lack of maintenence by the previous owner or owners. I'm using the Flitz brass cleaner here.
And don't even think about forgeting to post photos!
Every day I'm getting more and more attached to the Epic. I love the weight, size, feel, looks, playabilty of it.
Sam