YES that's what we're saying...
The issue you're having with your dealer is unfortunately not uncommon. While they are often very well versed in AG and L&G tractors built in the last 15-20 years, they're lacking on older equipment. My dealer KNOWS that I know more about the older Ag and L&G tractors than he does. Sad but true...most of my tractors are older than the guys behind the counter, heck they're older than me for that matter.
NO...no good on implements either.
JD Paint is good paint, all I use on my tractors, (Deere's anyway) many years ago I bought it for about 7 bucks a can, now it's 12ish or so. Hang on to it and take it back when you're going that way. It'll take SEVERAL cans to paint your tractor anyway, one is a drop in the bucket so to speak.
Tough break I know...live and learn...