Well said... "skilled" is the focus. This is not about just forming limitations and corrosion, it is about electrolysis too. As stated before, we are marine welding and metal forming as a business. We have seen massive electrolysis damage happen much faster than normal metal corrosion simply because of interrupted anode failure.

Again I would pose the question, why are there so few skilled aluminum builders? Cost and service. I have seen skilled fitters cutting pie shaped slivers of aluminum to help make compound curvatures in areas where the base aluminum metals cannot be bent without breaking. This builds up multiple "notch" locations which service life affects resulting in weld cracking opportunities.

Non-engined designs will last longer because there is no bi-metal/battery issues... but repairing damage is the same hassle.

For me... small aluminum jon boats are fine because they trailer. Anything that is designed to sit in the sea 24/7, steel!!!! Beach cats by concept should be easily repairable in the drive way at the house. Metals complicate things.

Again... one might ask why there are not more skilled aluminum houses about. Guess one just has to see for one's self.

GR