I find that thread highly amusing as many of the examples of ‘see, see, Ford’s aluminum is to blame’ used there are of vehicles that at the time didn’t have a single aluminum panel. The Crown Vic so lovingly referenced never ever had an aluminum hood, and yes, the paint came off most of them, including my 2001 CVPI. Yes, it was steel. Yes, it came off exactly like these guys speculate the aluminum parts did.
The problem with Ford isn’t the aluminum. It’s (mostly) Ford’s paint and prep that’s the problem.
Meanwhile, I have two Honda motorcycles that are mostly aluminum, one that’s over 30 years old, and their paint seems to be staying on just fine.
I owned Honda CB 350s ( 2 )and a CB 750 k3 all from the 70s Only the engine/transmission contained aluminum. Frame, tank etc were steel.