Barry, I remember Rotosound's Linea finish. It is similar to the pressure-wound roundwound string by various manufacturers. However, I believe it was a core only type string over the bridge. This means you would have to raise your bridge very high, or have custom bridge saddles made for the core diameter only. The John Judge doubleneck was set up for this type of string. In fact, they made a special set for John, and when I bought the bass I also bought about 50 sets of strings. The 8 string octave bass sounded killer! Very bright and strong. The Linea finish was real smooth on the hands too.
Hugh, What type of round wound string did you use on your Buzzes? Were they stst or nickel? A roundwound nickel string won't mark the neck hardly at all. I agree, the Buzz has a very tough coating on the fingerboard, but I've seen some that were filed away from stst round wounds.
Also, as a follow up, I looked at the Birchwood Kasey's Tru-oil bottle, and it's made of Linseed oil and petroleum distillates. A thinned down Linseed. My old Luthier swore by Linseed oil. He also said don't use WD-40 or Fingerease or you will never be able to put a finish on the neck later if you wanted to. I think that would also go for re-fretting, and trying to glue in the frets. They might not stick.
Kris