Copper based alloys such as brass, can be immersed in a plastic bath of Surface Conditioner to remove Oxidation, heat stains, etc. After cleaning in this chemical the metal should be rinsed under a running tap until the water will no longer wet it. A product so treated will remain bright and shiny for some time without further treatment. It will also take solder without further cleaning. Whilst it is most effective on brass it also works on nickel silver. It does not tend to remove staining caused by excessive flux or other acid attack on metal. It does has a slight etching effect on brass and treated brass surfaces will retain paint without the use of zinc chromate or self-etching primers. In fact, it is an excellent pre-painting or pre metal blackening treatment for any metal.
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