Chisel like marks
Gidday guys, I asked the same Question some time back regarding a Canadian Carrier that came from the same place your machines at. The Blokes here answered pretty quickly that when the steel sheet was being manufactured it would warp/ curl what have you, so they put the sheets through a stamping process to flatten the sheets out hence the marks.
If you do a search within the carrier section of this forum under "Canadian Project" you'll find the thread.
Cheers David....
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