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I hope to get some info on hard anodizing pistons. I've got a nitro Harley that I want to hard anodize the pistons. Customer wants me to put skirt Teflon buttons in them. I have done the hard anodizing in a Procharged BBC that made 1500+ HP. After over 100 hits, we took it apart, & it looked like new. I'm told by a very knowledgeable man that all the clearances will be changed. All we had to do to our pistons, was hone the pin bores, & we opened up the cyl. bores + .002.Rings went in ok, with a minimun amount of sanding with 400 paper on a surface table. Basically the same as any other build. What should I be looking for because of the nitro application. I asked a guy that was a crew member on a nitro car & he said buttons are seriously "old school" . Any help is greatly appreciated. We had good luck with this in the past, but , I don't want to miss a beat on this one . If this is not in the right section, please advise where to post. Thanks guys