Wear gloves, eye protection, and a mask
Ventilate the area
Scrape off excess epoxy with a plastic scraper or putty knife
Apply heat with a heat gun to soften cured epoxy
Use acetone or isopropyl alcohol on uncured epoxy
Use epoxy remover or paint stripper for cured epoxy
Let the remover sit as directed
Scrub with a nylon pad or brush
Repeat as needed
Sand remaining residue with fine-grit sandpaper
Clean the surface with soap and water
Dispose of waste safely according to local rules