kdross
Here is a post on re-forming, this guy knows more about electronics in his sleep, than some of the aggro know all's here.
" Electrolytics will have a very long shelf life.
But will NEED to be reformed slowly to achieve their specified parameters. I am not surprised that high quality 40 year old electrolytic's still meet specification after reforming."
Also from Silicon Chip Magazine on how to do it, if you have the gear and knowledge. (you have to pay for the full article)
http://www.siliconchip.com.au/Issue/2006/October/Reforming+electrolytic+capacitors?res=nonflash.
As I said I've done many, never been a problem, so long as they didn't leak out any of their electrolyte fluid to start with.
Cheers George