Yep, hair dryer mostly does the trick then I've found that paint thinners works wonders on any sticky residue.
Thinners doesn't seem to harm the gelcoat but I'm always careful to wipe it off quickly.
Rob
Currently Fenn Swordfish S, Epic V10 Double.
Previously: Think Evo II, Carbonology Zest, Fenn Swordfish, Epic V10, Fenn Elite, Red7 Surf70 Pro, Epic V10 Sport, Genius Blu, Kayak Centre Zeplin, Fenn Mako6, Custom Kayaks ICON, Brian's Kayaks Molokai, Brian's Kayaks Wedge and several others...