Presto Black BST4 brush-on liquid is a fast-acting cold blackener for all irons and non-stainless steels.
Presto Black BST4 brush-on liquid is a fast-acting cold blackener for all irons and non-stainless steels. When applied to any clean ferrous metal surface, the solution, made by Birchwood Casey, blackens within 30 seconds and forms a durable, black finish that can be topcoated to form an attractive, protective black oxide finish, according to the company. The product is suitable for decorative metalwork such as light fixtures, locks, stair rails, architectural elements and decorative hardware that require corrosion protection, but with a more natural appearance that blends with surrounding architectural materials such as wood, stone or other metallic surfaces. The black finish can also be easily burnished to produce a warm-looking distressed pewter finish.
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