https://www.kijiji.ca/v-auto-body-parts/tre...anel/1611862573

Pre rusted - just like when they left the factory

Hmm, do you think Karmann pressed the body panels from rusty metal, or left new bare pressings outside for curing?

Oddly enough, water heater manufacturing companies do leave the tanks exposed to the elements for a short time so that they get a light coating of rust before the glass lining is applied. They say etching is necessary for the glass to stick to the steel and nature does it for free. I know, too much information.