Howard's test
So I went to Home Depot and got some Howard's Restore-a-Finish and some of the Feed-n-Wax too. I practiced first on some Pioneer CS-33s that I picked up recently at the thrift store. I used steel wool because, although they weren't scratched up too much and were already in pretty good shape (other than the dullness of age and a few nicks here and there), they did have some stubborn crusty stuff, like residue of some kind of liquid or something. There was also a 4" dia. circular mark on the top of one of the speakers that looked like ink or something that had been traced around something round. And the steel wool was just the ticket for that stuff--it wouldn't have come off with just a cloth applicator. It took a little elbow grease with the steel wool.
But the results are great, and I only did the RAF so far. What were some dull walnut cabs now look like rich, warm, oiled walnut furniture. This stuff definitely does the job. Tomorrow I'm going to test it on some big Pioneer CS-77s that have some substantial water marks from glasses (probably beer, too--the young guy I bought them from said that after inheriting them from his dad, he used them as end tables!). I'll try and take some decent before and after pics of that job and post them when I'm done. But so far, it's a definite :thmbsp::thmbsp:.