I used the newly seasoned caldero for the first time last night, to make fried rice. It's not fully nonstick yet, and adding the egg meant that I had a bit more cleaning than I expected (I should have cooked it in a nonstick first and then added it), but the seasoning held and everything but the egg was free of any sticking. It's definitely going to need more seasoning, but I was thrilled with the first time performance. Thanks for the tip about the flax oil method. I'll definitely be using it for my larger caldero and my cast iron items.
FYI, I went with 8 applications instead of 6, because the pan had a couple of small pits in it. That seems to have been a good decision.