That's what I was worried about. The bad news is that I don't have a lye bath, and since I might be moving shortly, this is not a good time to set one up either. On the positive side, the DO is not very dirty - mostly some very light surface rust. The SCO might not have helped it much anyhow, and I can probably clean it to a good enough standard to allow me to season it without lye or other high tech contraptions.
The main reason I asked about the SCO is that I have a bunch of other stuff waiting to go in, and I was trying to decide if the DO should come along for the ride. I guess I'll better give that a miss.