This E-Tech Engineering Technik Self-Etch Primer is specially developed to allow notoriously difficult surfaces to be painted, such as Aluminium, Stainless Steel, Galvanised, treated or untreated steel, Bare Metals, and Fibre Glass. It chemically etches the surface, creating a firm foundation for primer and paint, and microscopically impregnates the first few microns of the surface, promoting excellent primer and paint adhesion. The primer etches and primes in one step, is compatible with virtually any primer or top coat of paint, and is ideal for the restoration and refurbishment of alloy wheels. Available in a 400ml can.