My original Sequels became sticky about 2 years ago, and every time I moved them, I would get black marks on my hands. Having read abou tthe toxicity of the paint when it begins to degrade, I decided NOT to completely refinish them, but I did initiate a program of very agressive cleaning and sealing, and it has resulted in speakers that no longer leave skidmarks, and look pretty good.
I removed the ESL panels first, so that I wouldn't damage them with any stray cleaning solution.
Then, I used a LOT of those Windex Wipes (the ones that come in a plastic can) to wipe and wipe and wipe the cabinets until they no longer took off any black. At this point the finish will look like crap--streaky and blotchy, but don't worry--this gets fixed soon enough...
Then, I let then dry overnight, and began rubbing the cabinets down with silicone-based "tire shine" treatment (the kind you get in a pump bottle at car parts stores). Letting each coat dry over night (and you have to work FAST putting each coat on or it will streak all to hell), I put about 3 coats of this stuff on, until the cabinets looked even and semi-gloss black again.
Then another overnight drying time.
Then, to seal it all up, I put three coats of "Nu-Finish" over the silicone. This is the polymer car wax that somes in the bright orange bottle. This stuff is an AMAZING sealant--I use it to seal the bare-metal parts of my antique printing presses and they will stay rust-free for 2 or three years, even after being splashed with ink and press wash on a weekly basis.
Now my speakers look good--they have a nice matte black finish, and they don't smudge my hands when I move them. It was a fair amount of work, but nowhere NEAR as much work (or as potentially hazardous to my health) as stripping the NEXTEL finish completely off and having them re-painted.
Think "outside the box", man...
--Richard