Charcoal should do it and should add rigidity. A problem with pure epoxy can be is creep, especially at higher temperatures.
The ancient Neanderthalers used an advanced mixture of birch bark...
Type: Posts; User: Cordite
Charcoal should do it and should add rigidity. A problem with pure epoxy can be is creep, especially at higher temperatures.
The ancient Neanderthalers used an advanced mixture of birch bark...