I've done a lot of it and it is definitely not as easy as paint. I'm wondering what kind of clear you are using? I would much rather buff clear than gel. That being said I plan to gel the hull on my own boat in the next year or so. Gel coat has come a long way in the last 5 years.
I've seen several people mention they have re gelled entire bottoms, and I wonder do any of these boats get left in the water all season? I've seen a lot of boats that can sit in the water all season and never blister. Patch gel on the bottom doesn't usually do so good.
Some pictures of a brand new Mastercraft on there that I had to re gel this last month. www.bowkersfiberglass.com/class_war.htm