Carnauba wax or bees wax are the usual candidates. For simplicity, I always think "food grade" for anything pipe related, except acetone to remove a finish. 8)
@Robindallas - I've got that Herb Alpert on original vinyl and Rubber Soul is amazing. Welcome!
Slint - Spiderland
https://www.youtube.com/watch?v=FAApF-FDkoY
Skeenert!! :)
@JBC - I love that performance by Bowie. It's one of my favs as well and I appreciate his artistry more and more the older I get. More Bowie favs...
https://www.youtube.com/watch?v=ceZma9YI4xs
https://www.youtube.com/watch?v=YF_ESqYuhSQ
Sparks is freaky, it'll take some getting use to, but it's...
edit
Don't give up. I just load them to this site, click on it for full size, then copy image location and paste into IMG box.
Or, read this...
http://pipesmagazine.com/forums/topic/how-to-videos
Love the Reverend.
Never heard Sparks before. Sounds like They Might Be Giants had a baby with Barnes & Barnes.
David Bowie -
https://www.youtube.com/watch?v=pBQ-S6njQQw&feature=youtu.be
Thanks for posting. It's a good song and I can hear him singing it. I think he would of had it a little higher tempo. Brings back childhood memories. :)