Product description
PRESTO BLACK BST4 is a liquid brush-on blackener for all iron and non-stainless steels. Applied at room temperature by swab-on or spray techniques, the BST4 reacts quickly and produces a non-dimensional black finish in 30-90 seconds. The finish can be sealed with a protective oil and is suitable for use on precision tooling and machine components. Or, the black finish can be highlighted to produce a pleasing distressed or antique pewter type finish on decorative metalwork, architectural trim or hand-forged items.
