Would a simple hardness tester be sufficient to check the milk bottles? (Got a friend who's a mechanic at the airport; maybe his shop has one.)

Last edited by Skooter; 06/11/2023 4:47 PM.

Matthew 6:33

1952 Chevy 1/2-ton 3100
Late '55 235/SM420/torque tube 3.55
Dalton Highway survivor (using original 216)
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