I've never heard of anyone epoxying or glassing over a deck. You will completely trash your boat if you do so. It would take days and days of fairing and sanding to get a epoxy/glass layer to look as smoth as the original gelcoat. If you didn't spend that time, you boat will look home-made.
First be sure your deck's core is compeltely dry and in place, this is where deck problems largely begin (and end). If the core is not a problem, if you fell you must strenthen the deck, add glass to the underside, not the top. Generally better backing plates should do the job.
If you want to see what's involved in doiing a deck correctly, take a look a the pictures in http://web.mac.com/bicgreen1/iWeb/Site/Photos.html
Anything less your boat will look like junk.