I just went through this seasoning up an old Griswold #8 cast Iron Pan I bought off Ebay. First I set up an electrolysis Bath to remove rust and other gunk. I used my Gas grill at 500 degrees and gave it 6 coats. The flax Seed oil does have an interesting aroma, so doing it outside worked well for me. Now I want a slant logo #8 or #9 griswold dutch oven.