Anyone know what the coating is on the new sk5 srk and tantos?

[Hermit_Knight]

I used to easily be able to strip the coating off my aus 8 models but this new coating is different. Does anyone know what it is? Thanks!

 

[Man with no name]

Tuff-Ex

 

[Hermit_Knight]

Tuff-Ex

They seem to have changed the recipe for the coat cause it’s really hard to get off!