Extrude hone? Mo powa!FWIW, as I posted above, Brakleen does work, it's just ridiculously expensive. You'd need a dozen large cans for the tubes and at least three for the main plenum cavity. For that price, I'd just buy ortho-dicholorbenzene. This is the mystery ingerdient in Marvel Mystery Oil that dissolves carbon. It was formulated for fertilizer production, but it's used as a carbon softener & remover.
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