Surprised to find army green primer

[Dibbons]

After the previous two layers of paint were stripped from the body of my '72 SSP yesterday, I went back to the body shop this morining to find the first coat of paint they sprayed was an army green color primer. I can't explain wny, but it kind of reminded me of plastic. What is that stuff?

 

[Dibbons]

Update to above post. Retrieved the empty primer can from the body shop trash. Looks to be a olive green nitrocellulose alkyd automotive primer with dilution recommended between 1:1 and 1:1.5 with thinner. Brand name is "Excelo" licensed by Sherwin Williams and made in Mexico. Name on label: "Primer Universal Primario Nitro-Alquidalico 7100".

 

[SureGrip]

Looks like a self-etching primer. There was some I used 15 years ago, went by the name of 715 or something like that.