On occasions when I restuff caps, I like to use hot glue to seal the capacitor tube ends; it's less bothersome than remelting the cruddy old wax, and is easier to remove (for future restorations).
I used to use a brown Sharpie to color the ends, but I finally found these:
http://cgi.ebay.com/ws/eBayISAPI.dll...#ht_2283wt_982
The color is fairly authentic--it's far better than a brown Sharpie, anyway!
Other colors are offered, but dark brown is good enough for the likes of me.
A word of warning--there's another type of brown glue stick available for attaching hair extensions, but they are made of an unsuitable material...make sure, if you buy tinted ones, that you're getting regular old vinyl gluesticks.
If you really want to go all out, dip the whole assembly in new, freshly melted bees' wax--the resulting rebuilt cap is pretty much indistinguishable from an "original" one, but has the advantage of looking new (which is to say period, but new) and being
clean.