"Curious how much it cost to plate all those bolts 'n parts?"
Buried on one of my posts - it was C$160 cash. For that they did the final cleaning and degreasing, wired them up, and plated them.
Someone questioned the integrity of the plating - it is very well adhered.
I whacked a couple of parts with a ball pein hammer, and worked at a couple with a screwdriver and a scraper, and whole the coating itself showed some scratch marks, none of them went through the plating.
I considered the DIY approach, but a setup costs more than I spent, and that would be for a very basic setup without heaters, temperature controllers, or a decent power supply.
It looked to me that it is possible to plate with household chemicals, a strip of zinc, and some batteries, but to get it to a decent thickness and to adhere well more serious chemicals and process control is needed.
I decided to pass on DIY, in this case.
"Sometimes it's easier to just go and buy new bolts, nuts, washers?"
true but I decided there was some value in hanging on to the FIAT headed bolts.