Assess the damaged area size.  Simply cut out the damaged area with a utility knife. 

Be Careful Not to Cut through into the Epoxy Paint Below! 

Take out the damaged piece and clean the deck below.

Then cut the new piece to size 1/2″ to 1″ smaller all the way around.

Peel off the backing and stick the new piece into the cut out area.

Seal the edges of the cut out and the new piece installed.  

Allow the edge sealer to harden before going back to work as normal.