Paints for Metal and Wood

Bare wood and metal are traditionally treated with a three-paint system of primer, undercoat, and topcoat - which gives maximum adhesion to these constantly expanding and contracting materials. It's best to buy all three paints from the same manufacturer, as they're designed to work together. Properly applied, the paints are able to withstand climatic extremes.

1. Primer

The first layer of protection. You can buy oil-based and water-based primers. Some primers are for a specific type of surface - wood, metal, non-ferrous metal - but if you have a number of small painting tasks to do, it's most economical to buy a multi-purpose primer.

2. Undercoat

Provides a key - a surface to which the topcoat can adhere - and helps build the depth of colour, so always use the colour recommended for your chosen topcoat. Two coats of undercoat will increase the life of the topcoat, especially on exterior surfaces.

3. Topcoat

Provides a decorative finish and a tough skin that resists moisture, mould, ultra-violet rays, and pollution. Because it also provides a smooth surface, dirt is less likely to stick. The following finishes are available:

Liquid Gloss

An oil-based paint that gives the smoothest, shiniest finish. It's the most unforgiving of a less-than-perfect surface and is the most durable finish, so it's suitable for exposed exterior woodwork and metal.

Gloss

A hard-wearing, shiny finish that resists knocks and can be wiped clean. It highlights surface imperfections. Available in oil-based and water-based paints.

Eggshell

A slightly glossy finish - the oil-based equivalent of silk emulsion, but more durable. It can also be used on walls.

Satin

A mid-sheen finish. Available in oil-based and water-based paints.