Having read your article, I would offer a few observations:
~ I have a problem with your use of the term oil/grease throughout the article. Our grandparents used lard, bacon grease, cooking oil, and butter. Today we might use butter for frying eggs and canola/safflower/sunflower/olive oil in place of the lard and bacon grease.
~ a quality cast iron pan can be heated quite hot on a stove top with no problem - i.e. Cajun blackened fish or pan seared steaks can be cooked at high temperatures in cast iron
~ the best way to season a new cast iron pan is not to cook cornbread, but to fry French Fried potatoes in as much oil as the pan can safely hold; by heating the oil to the proper temperature for making fries, you will start the process of sealing the pores in the untreated, raw iron pan
~ another way to clean cast iron after use is to sprinkle some coarse salt in the pan and scrub with dish cloth or brush; the abrasive action of the salt will help to loosen any remaining food particles
~ it is possible to take an old cruddy cast iron pan (that bargain you found at a flea market!) and remove the old seasoning that might be rough and flaking: spray the pan well with oven cleaner - do this outside as the fumes can be harmful!; put the sprayed pan in a plastic garbage bag, close and tie the top of the bag and let it sit overnight outside; the next day or the day after that, scrub the pan well and see if more of the same treatment is needed; repeat this process until you have reached the bare (grayish) iron. Wash well with soap and water, scrubbing hard. Dry completely, then start the seasoning process: rub the entire pan inside and out with shortening, such as Crisco brand. Line a baking sheet with foil, lay pan on bottom up, bake in a slow oven (250 to 300 degrees) for several hours, let cool. Repeat the seasoning process several more times until the pores are sealed and the seasoned pan has a nice, smooth, black, glossy look to it. I reconditioned my grandmother's skillet and it is ready for the next 50 years. It was hard work and took several days, but it was worth it!