I seems that I one of the few to use Dynel. Since you sanded with 60 grit, you should have plenty of tooth for the epoxy to bond to.
Keep you resin & hardener in an air conditioned area near 70 degrees. Use a slow hardener. If you still have problems. Freeze about 1/2" of water in a cheap pie pan. Then nest a pan on top of it to put your resin mixing while you use it.
Keep yourself cool. Drink plenty of liquids...
Mini -Tug, KH Tahoe 19 & Bartender 24 - There can be no miracle recoveries without first screwing up.Tahoe 19 Build