It had some cool pictures of the process, that's why I linked it. In any case, most of what I find is in German. Like here it states that premium manufacturers

It had some cool pictures of the process, that's why I linked it. In any case, most of what I find is in German. Like here it states that premium manufacturers started using zinc galvanization in the 80s: https://www.seat.de/service-zubehoer/technik-lexikon/k/karosserieverzinkung.html https://www.seat.de/service-zubehoer/technik-lexikon/k/karos.... It also says it protects from rust despite abrasion.