I would normalize it a couple of time even though I take it you made the blade by stock removal. It will relieve any stresses that are in the steel that has built up along the way and make sure that the grain is as fine as you can get it. I would use oil. If you got it from Aldo, vegatable oil should work fine. Try to heat it to just above non-magnetic and soak lone enough to make sure it's heated all the way through; there's not much in the way of carbides to disolve and most of it will be cementite so no long soak should be required. I would probably temper it to about 375 degrees unless you think it will be use for a lot of chopping, then I'd try 400 degrees which worked for two big choppers I made from that steel. I recommend that you test the hardness of the edge before putting a handle on it. Just tape it up with blue masking tape to protect the surface and your fingers while you put a handle and any furniture on it.
You appear to have done some real good work there. I hope you post pictures of the final product. It's looking good.
Doug