CNC Mill Mark Removal in Intake Port

You must not follow Spierer because he’s changing his thinking some. He is really pushing the new Killer Carbide finishing bur

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You think he’s using that finish on the throat and SS as well? That would be a real reset in the ‘it makes sense to me’ category.

Edit: I'm referring to the top of the throat, as in the bottom angles directly beneath the seat angle. Surely the first couple of bottom angles are still smooth.