3. Have a large supply of old aluminum sheet of the type used on '50s/60s car and only use that when re-making panels.
4. Claims newer alloys don't weld well to original panels (Note: 'claims')
Salesmanship is always at hand when a company meets the public. These comments are typical in the industry, and I've heard other comments at Pebble and Monterey that also file under that "not adding up" heading.
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Those of us rather familiar with the Enzo comp car metalwork can easily testify to the great similarity between factory original alloy and current replacement alloy available on the market today.
Although, there have been those unfortunate cases where restoration craftsmen have not known enough to correctly identify either what they were restoring - or, to correctly identify what they obtained as replacement materials - and assumed (the word "assume" here equals three words combined: "ass," "you" and "me") incorrectly that the alloy they had was correct, and their jobs eventually started coming apart.
But then, this is not at all limited to Italian cars, nor is it limited to auto restoration.
Caveat Emptor.