Silicone and modern cheaper Concertinas.

[Alan Day]

Silicone is a superb non stick ,wood to wood, wood to plastic and plastic to plastic lubricant.

It can be purchased from any large car component supply company such as Halfords and is sold in Aerosol cans.

For application I would recommend that very little is sprayed into the lid and then applied by a very small brush in small quantities.

It is very useful on cheaper models where plastic is used in place of leather. buttons etc.

A Small brushing on the plastic buttons sticking on the wooden finger board may prevent the button sticking. (Wipe off any excess)

I would not use it on the bellows as any future tear ,or repair would not take to it. 

Al

[Jody Kruskal]

Personally, I prefer graphite.