FB, thanks for the info. I just Prolink'ed a KMC gold chain that is on a used bike I got, and black gunk was coming out of it forever. It smelled very "industrial", so I'm suspecting it was Chain-L on there? The chain and cassette were both so dark that I couldn't tell the chain was one of those gold ones, and it took forever to get the cassette decent looking, still not shiny...

If that was Chain-L in there, I have to say that I was impressed how much of it was in there and didn't come out until I hit it with the Prolink. Does Chain-L migrate back out of the chain innards that much, or was it probably that the rider before me didn't bother to wipe down the chain enough? From the review by Ed Pavelka and seeing the amount of stuff coming out of the chain, I'm very tempted to try it...