I'm not an expert on Porsche paints by year but I think '84 was still SS. IDK what the painting restrictions are AFA buying in TX but there's always MX for anything you need. I find SS to be really easy to spray but I grew up with NC lacquer, then acrylic lacquer and finally acrylic enamel which we refer to as SS.
If you want to become a YT trained painter visit Paint Society. Here's the results for SS:
https://www.youtube.com/@PaintSociety/search?query=single%20stage