Slow rust blacking

[pegasus]

Hi. anyone know of a none Nitric acid slow rust black solution formula which works
Most solutions require Nitric which you now cant buy and searching the internet I discover that most none nitric ones don't work.
I am not after other ways of blacking just a tried and tested solution.
Thanks.

A little used blacking solution that works. Source oak shavings ( must be oak ) and a suitable container big enough for the part to be blacked and enough shavings to bury it completely in the middle of the shavings, add water till the shavings are damp and leave till the desired shade of black is achieved, the only downside is it is not a quick process.