- Joined
- Sep 29, 2017
- Messages
- 2,244
Thanks. At least I can try to compair it to some products we do have here. I don't no yet where to look for it,but it is a start.Zuki, it's usually phosphoric acid solution, with a bit of chromic acid in the mix to help the controlled oxidation reaction along. If you pre-heat the part (or solution) it will blacken almost instantly. It works well. I don't know if US brand names are of any help in SA, but the product itself is ubiquitous.