To tell the truth, I tried it on my dreadnaught, but not with blues (I hope this doesn't get me banned from the thread :). There is a Carter Family song that starts "G'wan and leave me if you want to," in which the Autoharp accompanyment slides. I tried to imitate that. The slide is in the opposite direction from the bottleneckers (I think.) The results were encouraging--at least it didn't go bump, bump, bump over the frets as I feared.

I am using extra-light strings and a piece of copper plumbing pipe that I smoothed down to make safe for my finger. My privacy is sort-of guaranteed by the lack of volume. I would be curious to know what other people use.

Murray