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Mike, you can buy this stuff on ebay.
The only thing I cannot buy is the Verdigris. To make that I need copper pipe and a chemical from ebay and it will create that green oxidised matter.
Cheers...

I'm not sure how the last photo looks to you but it is not mottled. Just solid black.
I did expose only one scale to the sunlight. The bronzed metallic scale is really nice but resembles some thing...

Today i placed the scales in direct sunlight.
Leaving for work before sunrise and returning home after sunset i was forced to wait for the weekend.

The scales turned jet black..

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Brontosaurus:
Excellent information thanks. I was a little worried because it is caustic but now i know it is not too caustic.
I have a long way to go with this but it is definitely they way...

I decided to try my hand at dyeing scales with Silver Nitrate after reading an old post by the late Neil Miller.
This process was used in the past for dyeing horn scales.

I found myself with a...