<font color='#000000'>IMO, refoaming is a easy way to breathe in new life into an old set of speakers. With older speakers, it is difficult to find exact replacement drivers, unless you have a very popular speaker, like the old Large Advents. It is even more difficult to find a suitable alternate driver. (I had no choice of replacing the driver on my old Infinity RS sub. It was an unusual 2 ohm, high sensitivy woofer, that even Infinity could not recommend a replacement for, nor provide enough specs for that I could even attenmpt to replace it. It was either refoam or throw it out.)
As long as your speakers were not abused, you will be pleasantly surprised how they come out. My old sub buzzed like crazy because of the torn surround. Once fixed, the bass is nice and tight again. It is not hard to do, you just need to take your time and be careful. Removing the old surround takes time, mostly because you are removing old glue. I was dealing with speakers with polypropylene cones, so scraping them wasn't to difficult. I have not done speakers with paper cones, which I imagine would be a bit harder. I did not use any solvents (such as Goo Gone) to remove the glue, beacuse I was worried about affecting the adhesion of the new glue.
Be careful with the new glue, because it is very sticky, and if you use too much, you will have a hard time keeping the new surround clean, since you will pick up glue on your fingers as you work your way around the cone, pressing the surround into place. Even after refoaming 3 speakers, I still get glue on the surrounds. Argh! Luckily, I don't listen to my speakers with the grills off. Also, don't worry if you have an odd size driver that they cannot find an exact replacement for. I had to cut a surround and overlap an edge on my sub, and it sounds and has held up fine.
As far as cost, figure around $30 to $40 for a kit which includes a pair of replacement surrounds, shims and replacement dustcaps and glue. I liked the people at Winston Organ because they took the time to find the best fit surround for my speakers, and were very helpful on the phone. Where ever you choose to buy from, at least make sure they are selecting the surround based on a set of dimensions you provide, not just by saying "it is just a 10" driver". All "10" drivers" are not the same size. The 10" driver on my sub was actually 10-3/4" (to edge of frame). The other important measurement is the actual diameter of the cone. The difference between those two dimensions is the distance the surround must span. As you can see there are a lot of variables for finding the right surround.
Sorry this got a bit long, but I hope you find it useful.</font>