An additive used to provide a chemical reaction to cure paint. Also used with some primers to convert them to 'non-sanding' versions, by changing their properties and making them suitable for wet-on-wet procedures.

Liquid made up of water, anti-freeze and inhibitors used to cool an engine in a sealed but circulated liquid system.

Coil on plug, where a different ignition coil is used for each spark plug on an engine. Also known as direct ignition.

A difficult metal substrate to paint. Also used in the manufacture of special decorative pigments and synthetic driers.

A steel plate fitted into a cylinder block or cylinder head casting after the casting sand has been removed in order to produce a fully sealed component.

The decomposition of a metal in contact with its environment - a chemical reaction of oxygen and moisture or corrosive materials on a metal surface. Also called oxidation or rusting (on ferrous metals).

An acid or other chemical that will chemically react or attack another material.

The Control of Substances Hazardous to Health Regulations 2002 is a United Kingdom Statutory Instrument that stipulates general requirements on employers to protect employees and other persons from the hazards of substances used at work by risk assessment, control of exposure

The actual cost to the manufacturer of producing a vehicle (it does not include mark-up).

Tapered pin used to hold shafts into housings. May also be used to describe a split pin.