I don't have any videos (and I've neglected my website for a while), but there is some detail on my website about doing fiberglass work and bottom jobs. If you really want to go overboard with it, my first part of an unfinished two-part series is here:
http://www.teamseacats.com/index.php?s=bottom+job http://www.teamseacats.com/index.php?s=bottom+jobEpoxy itself does not sand well and it makes a good filler only if you don't plan for it to be the last layer. Epoxy yellows quickly with exposure to sunlight leaving it looking pretty bad. Ideally, you want to fill minor imperfections with a body filler. There are marine specific versions but I've had good success with the premium bondo brand...make sure you use the premium. Body filler is not very durable and will definitely need to be top coated with gelcoat...but it's a really involved process to do all this and get a good result...and there's not much instruction on it. If you think you want to go this route, read that article and ask some questions - it might finally motivate me to complete part II!