Any chances of saving this?

Originally posted by u/MikeOnion at 2025-06-04T13:57:32Z

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While making ECM barrel I had to stop because I wasn't able to measure precisely the ID. It is mostly 8.73-75, but reaches 8.8 in some angulations and is below 8.7 in others. I now noticed there are a lot of striations on the inside, and most of the rust is formed there. Also they can be the reason behind the bad measures

Question 1: any possibility of saving this? Maybe with honing brushes and a lot of patience

Question 2: is this caused by bad boring process? Boring rod was not the smoothest and I put it back inside without cleaning it every time (Used citric acid too so I had no sludge but the rod became black quite quickly)

First time doing ECM, surprised by how easy and quickly it cuts but quite disappointed with the result Also maybe turning the tube upside down more often could avoid misalignment or disparity in measures

Any suggestion is appreciated