does the test indicate if the crack goes right through?
Its interesting - in the UK guns are generally just sold based on proof and sometimes wall thickness - i wonder how many guns that are considered safe and in proof have flaws in them!
The pitting really wouldn't bother me.
the cracks a bit concerning - one of those things once seen cant be un seen - would i want to knowingly put hours of work into a potentially flawed barrel set; no.
Would i line the barrels? eeegh probably not for what its worth.
the picture you shared in the other thread shows some great skill in making these guns - have you thought about making a barrel set from scratch - although yes you wont get damascus tubes you will be able to build the breaches and properly replicate the less tapered more svelte barrels of the original flinters.
Belgian gun makers perfected a technique for "imitation" Damascus, so with a bit of practice getting a twist Damascus appearance could be possible.
