I've used it with GREAT success ( TOTAL BOAT EPOXY KIT ). Order the kit. I buy the gallon kit - leftovers for future fixes. It pre measures everything perfect, one pump of epoxy, one pump of resin = 5:1 ratio - i use the slow cure so it seeps into all the nooks and crannies.
DON'T over force the epoxy in........... it will swell up the soft spot like injecting a thanksgiving turkey with cajun butter! Ease it in until it gently oozes out of the next hole ( i do a pattern about a 4" grid ) tape up the holes tight with pre cut pieces of 4" long tape ( maybe 50 ) TAKE YOUR TIME.
Within two days your decks will be hard as a rock but the holes you drilled will have counter sunk with epoxy about 1/16" or so. Putty those up with your fav filler( bondo, marine-tex ect ect ) then sand down level after the following day. Cosmetics are up to you!
The kit is here.
http://www.jamestowndistributors.com/us ... Epoxy+Kits