Spoke to Menard's who was, surprisingly, no help at all here. I am going to Hobby Lobby, who sell the product, to see if they have some sort of a glaze for it.
I do have several test pieces that are happily soaking away in some water.
The first test was done using the exact product instructions as to time, 15 minutes per 1/4in, and temperature, 275 degrees. That test failed, IMHO, as the resulting structure got slimy after just 10 hours of soaking in plain water.
Currently, I have 3 more pieces soaking with much better results, as of yesterday.
One was put in the oven for 30 minutes at 275 degrees.
Another was put in at 250 degrees for an hour.
The last was put in at 275 degrees for 45 minutes.
All appear to be fine with no side effects as of yet.
I plan on running these test pieces until Wednesday, giving them a full week underwater. Then we'll see what happens to the resulting structures.