X-ray, or Magnaflux ?

[Autumn Daze]

Thanks John, It's all good input.

[Phil C]

I would possibly try Fluorescent Penetrant Inspection. We use this and a skilled inspector can detect even very small defects very accurately. Many aircraft service centers have the ability to do this. I am sure there are other industries as well. Fluorescent is dye penetrant inspection but uses a fluorescent penetrant and a black light to detect cracks. I cannot tell you how this would work on Damascus barrels but in theory it should provide some good results.

Phil