Machine Building2...black oxide finish

Here's a quick update on where the Frames are currently at...

Black Oxide:
With all of the Frames linished, reamed & stamped, it was now time for the Black Oxide treatment.
Being that it's a specialised process, I simply drop the Frames off & pick them up the next day.
They come back with their Black Oxide finish, but they're also covered with oil to minimise any rusting.
So obviously my next job is going to be a thorough cleaning & remove all traces of that oil from them.

Here's the Frames just back from getting their Black Oxide finish.

A closer view of the Frames.
Note that the surface texture is just a thick covering of oil over them.

Another close up view of the Frames with their Black Oxide finish.
Note that the surface texture is just a thick covering of oil over them.