a friend of mine recorded his songs, then went about selling em.

Good songs too, great individual voice, spot on guitar playing.

But

The squeak of the hand up and down the guitar neck added nothing but distraction..

It was only when it was all done and dusted and it was too late.

So have someone you respect to listen to it before going into mass production

Talcum powder avoids that squeak and makes for fast and smooth movement but in time it will wear away the polish/varnish/lacquor on the back of the guitar neck.It apparently contains trace of aluminium???

I now possess an old looking guitar -Chriss Cross Dread't copy - with a glistening shiney neck and I avoid the powder!!

Think what it does to baby's bums.

All the best.