I've been using CI for (coughs) years.
Two tips,
One, scour well before use with a nylon scourer, rubber gloves, dtergent and the hottest water you can stand. It does remove any wax and film before curing which is vital.
Use oil, not fat, really. When new, your cast iron will be rough to touch, fat is hard to get even and will run and puddle. Use vegetable oil. Apply a very thin coat with a brush or cloth and bake at a low oven temperature for an hour. Take out and let cool. Repeat at least four times (after the first you will see some brown areas and some grey - where the oil hasn't been even - focus on these next time but keep it thin). Its like painting glos paint - thin coats and lots of them. 4 to 6 coats later do a couple of fry jobs first - fatty bacon and onions or something. Then you are good to go. Just rinse after use - never scour, never use harsh detergents
My views
red