Been playing with this since the original post. Used the #10 Gris yesterday to make up some Brussels sprouts (break them up down to the hearts, cut hearts then high temp them all in a little EVOO, S, P until a little caramelized, then splash with some balsamic). This was a restored pan with lid. So of course after every use I am trying to rebuild the patina. Warmed oven to 250, slid the pan in, waited about 1/2 hour. Pam spray and wipe. About 30 min later, just a wipe with the towel then jacked the temp to 350 with pan in the oven. 30 min later opened and wiped again just with the towel. Then just let it come back to room temp. This pan is now turning a nice jet black with a very even coating.
I've been using Crisco and higher temps previous. This method is definitely worth working on until I have it down. The pre heat before spraying is key. Much like other methods. I have not been religious about pre heating and this definitely was the trick today. Also wiping well to remove excess and then wiping during each interval to redistribute.
Almost makes me want to run the #3 back through, but I'll wait until I use it again. Which is pretty often. Next time I will just let them come back to temp in the oven after the stint at 350.
I really liked working with the Crisco, but bacon fat was better. Crisco left things brown for me even at high heat.
Definitely would like to hear from others that are using this method now, especially with fresh iron out of the restoration process.