What the hell is the magic secret? I've seen Sherman do it in about 9 seconds (albeit with a 100W gun), yet every time I have to desolder a ground (eg: on Drew's volume pot last night) with a 40W gun (which should be plenty), I end up having to hang out for 5 minutes holding the damn thing on the solder-blob.
What's the trick? Once the solder starts to melt it's fine, and from thereon-out it's easy to work with, but I've been through this a bunch of time on various guitars. Sometimes the pot will be so hot that I'm worried about the internals melting, yet the glob of doom is still staring at me, sold as a rock, laughing it's shiny metal ass off.
I use a 100 watt gun to cancel these.