Somewhere between their rolling mill and my bench someone is not
taking care of business. Couldn't a tip be taken from coppers
suppliers... They use a poly-film laminate and the surface is
flawless regardless of the size of the sheet.
I don’t think your expectations are too high! I’ve had this happen a
few times too. If the marring was slight, rather than go through the
exchange hassle, I’d clean it up in finishing or work around it but
as you said, a pita.
The problem I saw was that the shipper placed the bare sheet(s)
between two pieces of cardboard and secured it with strapping tape.
It usually arrives without bending but the cardboard is abrasive and
the motion of the UPS trucks is similar to a vibratory tumbler.
When I called about it before returning the sheet for replacement, I
explained about the abrasive nature of the packing materials and
specifically requested that they place the sheet in a plastic bag
first to prevent scratches.
The replacement arrived in good shape but I’m not so confident that
procedure will always be followed.