Why is my Epoxy coating not hardening? Surface is gooey and dripping after curing for 72 hours.

Improper measurements / Improper mixing. The soft or gooey coating must be scraped off and removed from the surface using a putty knife. After removing soft/gooey sand surface lightly with 200 to 220 grit sandpaper, clean with denatured or rubbing alcohol using a soft lint-free type cloth to remove any dust or sanding debris. Afte alcohol dries you're ready for another flood coat.