Hey GT,
I actually did the Restor-a-finish in my master bedroom suite while watching a movie. Maybe I got a little less sensitive to it, but from a fume standpoint it wasn't bad at all - course these L19's are smaller speakers. I took out a heavy duty trash bag and set it down on the carpet, then the speakers and wiped away - (after some steam swelling of some deep scratches, light 220 sanding to scuff up the finish a bit) - everything came out looking pretty good. It was a good hour or two before I remembered I should ventilate the area so I opened a couple of windows and balcony door, aired out in no time. So, with some ventilation and protective tarp layout, you might be able to do them, in situ, right where they are, it was pretty easy. Or just mark the current location with some 3M blue painters tape on the floor, and then remove to a suitable location. I suspect for you it could take maybe 1 or 2 hours tops for a couple of RAF and FNW applications and you're done!
As noted above, the shallow scratches blended in easily and are barely visible. The deep scratches darkened and are visible but look much more acceptable. The surface finish is very smooth except for a very few spots, could be even glass like if I elected to finish sand with 320 or 400, but I think I'm going to skip that and just put on the Feed 'N Wax a couple of times and buff it out. These will go to a friend of mine for his video monitoring setup. He wanted some vintage JBL's to work with and the natural patina and presence of a Walnut JBL cabinet in this condition should add to his ownership experience.
I'll try to post a couple of pics soon.
Bart