Never heard of it either but from the name, Rayflex it sounds like a flexible, ultra violet light resistant paint.
A google search came up with several links you might want to check. I searched for rayflex paint. One of them says:
Hawthorne "Rayflex" Acrylic Enamel, Beautiful OMAHA ORANGE great for complete re-spray of vehicles. This is "first quality" acrylic enamel paint, not "modified" low acrylic content paint. Compare us to any name brand at any price.
Many of our customers find our product offers the same quality as many top name-brand paints at considerably higher prices such as PPG, Centari and Dupont Imron.
Here is a place that sells it:
Paint place
