I've been playing around with parkerizing/phosphating a little over the past few weeks, and I really like the ability to redo my own fasteners (especially since I have a blasting cabinet). I was looking on Eastwood's website, and I saw their Tin Zinc plating system. To make a long story short, is this something that I would find useful for restoring early Mustangs? I know that the gas tank neck on a '65-66 Mustang is tin zinc plated, but I'm really not sure how common tin zinc is as far as the rest of fasteners/parts on an early Mustang.
I mostly restore '65-69 Mustangs; are there enough zinc plated parts on these cars to justify purchasing this system?