Quote:
Originally Posted by webfoot
Assuming you mean black phosphate, it is very easy. It has been a while since I tried it but basically I think I just added some solution and boiled the (bead blasted & clean) parts in a mesh strainer. Then hit with WD40 after to remove any moisture.
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Yes. I've just always heard it referred to as black oxide. It's really etching not coating I guess. The way they treat fasteners to inhibit corrosion.