You mean refoamed?  Reconing means you're changing the entire cone which I doubt.

Talking personally, I have a pair of REVOX Plenum B which were refoamed (foam surrounds changed) and the surrounds are way too stiff now as the bass is completely gone.

So be careful at selecting your new surrounds.  I heard only good things about Dr Kurt Muller surrounds.

In case you ask, use foam is foam was, don't use rubber unless you have no other choice. 

I refoamed the 8" mids, and I redid one of the 10" woofers with foam supplied by a seller in the Netherlands.   The other 10" woofer has a severely warped paper cone.   Refoaming it will not work unless I replace the cone.   And if I replace one, I want to replace both so they sound the same.

So I have found someone who is going to take a crack at putting new cones and spiders on the 10" woofers.  There is a local place here in Salt Lake City that does recones, and they said they would give it a go.   So.  Dropped them off, I supplied new foam surrounds from goodhifi off ebay (his 8" foams fit the 8" drivers perfectly).   So...   fingers crossed.  I'll update when I get them back.  Hopefully they are like new. and I can put the originals back in the cabinets.  

Then I'll have 2 10" peerless drivers that will need a home.  I guess I'll have to build a big sub woofer box for them and get another amp.  hehe.