Thread: Cast Iron Seasoning

Black spots will be the season coating lifting possibly.
When you coat with oil you want to wipe out as much as humanly possible, there should only be a micro film of oil which bakes and becomes the hard non stick coating. The uneven layer is normally because there is too much oil prior to baking.
Try scour out the cooking surface again with a scourer then just re season. Or just keep cooking with it, it’ll season itself eventually.

Proper seasoning takes quite a few repeats to build up those micro layers of baked oil.