Been using the Black Oxide plating solution from Caswell Plating for a while now and parts have turned out great. Like painting, it's all in the part prep work. You will have to remove the rust by media blasting or other method. The trick to getting the parts to look good is buffing the parts with a brass or wire wheel, giving them a shiny sheen. Also clean them with a solvent and rag before dipping in the solution. They go into the plating solution no more than 5 minutes. They get rinsed off, air dry but then you have to spray an anti-rust type coating on them, which actually gives the parts a deeper black sheen. Good luck!
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Norm J
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