Good oil for your gut strings!
Maintains the plain gut strings' life and also helps keep them clean.
I've used this oil for the PIrastro Chorda gut strings, mainly for the plain gut D and G strings, I don't know whether or not it's helpful to use them on the wrapped strings.
The bottle might be a little messy if not handled carefully, I've spilled it on a carpet... but that's life.
Recommended for the gut user!