Random skin thoughts:

Removing old glue: Easy to do with an iron and several brown paper bags.  Cut
the bag into sections as long as possible and wide enough to make around 5 
passes.  Fold the bag or use multiple pieces so that the iron doesn't get any 
glue directly on it.  Use a heat setting just high enough to melt the glue onto 
the bag.  Continue until skin is dry.  Reglue as per instructions on can.

Kicker skins: I really love these as they make many snow conditions (where wax 
does not work well at all) a pleasure to ski.  Sure you could use full-length 
skins, but unless you are going up something steep, these have less glide and 
are heavy when you are doing 5 km of approach before you really need them.

New Kicker skin idea: Integrate the ski and skin so that there is a smooth 
leading edge.  This would improve the glide in harder snow conditions, but would 
require a part strapped to the ski even when no skin is being used.