Another cast iron question: In my parents things, I found a cast iron pan with many layers of grease cooked on it. What do you think I should do to clean it up ?
Scrape off what you can. Put it in a self-cleaning oven for 2 hours. All the residue will turn to powder that you can vacumn off. Reseason a few times and then use it. I never know when buying an old cast iron pan what it was used for and prefer this method. Then I know my grease is my own.