amazon sells a 4 pack of clay bars for $10. get some chemical guys spray wax or lube in bulk, still cheaper than autozone "kits".
OP, just wait until you get into machine waxing... I just got the random orbital buffer from Harbor freight... brought my metallic black 335 back to life, looks amazing. also did my wife's space gray x5 and then both my parents cars and my inlaws cars.. It's addicting to see how good they come out with 3-4 passes of a machine.
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