Friction polish is essentially shellac mixed with waxes and other ingredients to make it easy to apply on the lathe.
Consequently it has all the characteristics of French polish. Resistant to knocks but totally vulnerable to anything else.
So I agree Phil, friction polish is not a hard wearing finish for pens. I never use it on pens I am going to sell.
Trouble is it is easy to apply and gives an immediate hgh gloss. Could this be why people continue to use it? 