I’m not sure when I noticed it, but I think as the pipe has been (slowly) coloring, it might have become more prominent. In the attached picture, you can see a long vertical hairline crack to the left of some scratches. It’s hard to get to come through in the picture, but it looks different, perhaps deeper than the scratches.
Is there anything to worry about here? If so, anything to remediate, or prevent it from getting worse?
Is there anything to worry about here? If so, anything to remediate, or prevent it from getting worse?