OK, so I am pretty much there with my current project tiller,

I want to try this technique

- impressed lines filled with 'some kind of black mastic' (Breiding, D, "the crossbow of Ulrich V"). Any ideas what the mastic was or how to replicate the finish?

I want to try this technique

- impressed lines filled with 'some kind of black mastic' (Breiding, D, "the crossbow of Ulrich V"). Any ideas what the mastic was or how to replicate the finish?