A box cutter will leave this type of mark.
Seems like a feasible explanation. As already stated: There is a thin dark line visible, in the first picture, in certain areas of the "raised" line, possibly the actual cut into the surface. The rest of the line may be the metal (pushed up from the razor cut) folded back over and covering the cut making it seem like a raised line. (?)
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Edited by Rothery
04/14/2021 9:41 pm