Yes, as it happens I recently purchased the new Iron Man magnet to take it apart for the figure. Luckily I took photos as I did it!
I started off by prying out the magnet (just go around the edge carefully with a sharp knife)...
Then I chiseled away around the screw (see above) with a craft knife...
And it was loose enough to pull out the torso section! (it took a good tug, and the hips are glued to the main body)
I'm too scared to cut the metal incase I damage the back of the body, but I'm sure if you're careful enough it'll work out!
Also, the magnet/base can be reused as the magnet just sticks back on! A bit of blue tack on the back of another figure and you have yourself a new magnet!
Hope I helped!