How to Season SteelTweet
You can use various types of oil to do this such as canola, vegetable or flaxseed. The recommended type of oil to use is 100% Organic Flaxseed Oil. It's usually stored in a fridge at your locally grocery store in the health food section. Below is the type I found. It doesn't have to be this brand. If you want to remove all the original seasoning on your pizza steel use Bar Keepers friend.
Step 1: Make sure Pizza Steel is completely dry, put it in oven for 10 minutes at 200F. Give it a few minutes to cool down before you touch it.
Step 2: Shake the Flaxseed oil bottle well. Using a paper towel apply a very thin layer coating the entire steel. With another clean paper towel wipe it down so you don't see any shine on it. The steel is sanded so the oil will absorb into it.
Step 3: Place the coated steel in the oven and turn the oven on to 500F. When the oven hits the 500F temperature then start a timer for 1 hour. After the hour turn off the oven and let it cool for 2 hours. Caution: Steel remains hot for a long time.
Step 4: Repeat steps 2 and 3. Don't apply thicker coats of flaxseed oil to speed this up. Make sure you apply a very thin layer each time.
Step 5: Repeat step 2 and 3. 3 coats should be good enough to cover the entire steel. It will have a dark golden brown finish. You can do more coats if you want.