Seasoning a cast iron skillet

Been needing a cast iron skillet, so I was looking on line for best prices. Tractor Supply carries Lodge (so does Williams-Sonoma), at a very good price and it's only 5 mins from where I live. So I get it home and the label says pre-seasoned, but it doesn't have that black slick shiny finish. So, I took about a tsp of vegetable and smeared it into the skillet. I had preheated my oven to 500 degrees. I laid a piece of aluminum foil on bottom rack to catch any drippings. I placed skillet w/ bottom side up and baked that baby for 30 minutes. After 30 minutes turned off oven and I let the skillet cool inside oven. I repeated this process 3 times. My skillet has "the look". I will be testing tonight w/ an Ina recipe. I will keep you posted.