Robert,
You probably won’t be able to bring those tires back to life. From what I’ve heard the effects of the tire prep solutions are good for a lap or two. Check with other racers in the paddock. Someone may have a set of worn tires that they are planing to toss that better than yours
Tire prep has come out of the dark ages. Just get trac tac blue tire wash to clean then after they dry, put several coats of trac tac SST on them a few days before you run. Follow the instructions on the can and you’ll have a good result and run those tires down to the chords.