Hammerite is a brand of paint made by Hammerite Products, a subsidiary of Imperial Chemical Industries.
Hammerite paint was first developed in 1962 by Allen Forster and later manufactured at the Finnigan's factory in Prudhoe, Northumberland. The company also produced the anti-corrosion treatment Waxoyl. In the early 1980s, the company was acquired by Hunting plc who later sold it on to Williams Holdings in 1993. ICI acquired the company from Williams Holdings in 1998. 
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Hammerite products includes rust prevention and restoration paint, and are based on zinc phosphate as the active ingredient. Products made include interior and exterior paints as well as special metal primers (for metals such as aluminum, galvanized and stainless steel, chrome, brass and copper). Many of these paints feature a hammered look, hence the name of the company. Hammerite is best applied in a two coat process. Due to the nature of the product, you must either recoat within a four-hour window, or wait a week to recoat the second time. It is a very sticky product, you can use Hammerite "paint thinner" to thin the product out, if you are doing a big project, this is recommended as it has a tendency to get sticky over application. In lieu of their particular brand, you can use laquer thinner. Although not recommended mineral spirits paint thinner can retard the dry time and make it easier to work with (phone communication with Hammerite, 2014).