German liner restoring/ leather part cleaning

[Dimas]

Need to see the condition of the liner, most probably you have unrestorable condition and just will destroy it. Vaseline is OK, just mix it with Isoprophyl alcohol, and stir. But I strictly advice to show it here firstly, and better if you've never done that- don't try
( before my job was born results, I've destroy a couple of things