Best Way to Season Used Cast Iron?

My fiance just bought a used cast iron dutch oven from (which is full of hidden treasues by the way). It's in ok condition, but definitely needs to be re-seasoned because the bottom surface is uneven and there's minor rust. I found this website which gives lengthy instructions on how to season a used cast iron skillet. Do you all think this is the best/only method to do so?

If it is, can I do it without using bricks?

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