I'm guessing it's the RC version, not the beautiful DW fiber version. Unless it was frozen it still may have fog. Panalure was great paper, I mainly worked with the fiber base stuff. It was the only way to get a correct print from a color negative. It works just like any other. I would develop for 2 minutes in Dektol working solution at 68 to 72°F, stop bath, fix the same. Hopefully it's not fogged and you have a big box. Make a test strip. White light no VC filters.