So, I just received in the mail a very nice, very clean looking Red-O-Ray wound A string (thanks mate!). Once installed, I noticed the string was buzzing... the core had shrunk away from the winding. So, what the heck, says me. Time for an experiment. Got a quart ziplock bag, wound the string so the fabric wound ends were not in the bag, and poured olive oil liberally in the bag. Several teaspoonfuls, so there was plenty to go around. Made sure the entire surface of the string got oil nice and all over it. I left it for half an hour. Pulled it out, wiped it down and re-installed it. The buzz is GONE! As a side benefit, I also wiped off a lot of dirt when wiping down the string. Thought I would share, since there didn't seem to be much positive or negative about oiling wound guts.