The short answer
Acrylic is the right choice when you want light to pass through a sign. Stainless steel and PVD finishes give a durable premium metal look. Brass gives warmth and ages naturally. Aluminium is light and paintable for large letters, and ACP is used for flat fascias and cladding behind the letters.
Why material matters
Material decides how a sign looks in daylight, how it can be lit, and how it ages. Here is how the materials we use most often compare.
| Material | Look | Lighting options | Outdoor durability | Care |
|---|---|---|---|---|
| Acrylic | Glossy or matte, clear, opal or coloured | Front-lit, edge-lit, backlit | Good with UV-stable grades | Soft cloth, no solvents |
| Stainless steel | Brushed or mirror silver | Halo-lit, unlit, metal returns for front-lit | Very good | Mild soap, no chloride cleaners |
| PVD-coated steel | Gold, rose gold, black, bronze | Halo-lit, unlit | Very good | No abrasive pads |
| Brass | Warm gold that darkens with age | Halo-lit, unlit | Good, develops patina | Lacquer to slow tarnish |
| Aluminium | Light, takes any paint colour | All types | Good when painted or coated | Wash periodically |
| ACP | Flat panels in solid, metallic or textured finishes | Background for letters; routed lightboxes | Good with proper sealing | Wash; check sealant |
Acrylic
Acrylic is the backbone of illuminated signage because it carries and diffuses light. Opal acrylic spreads LED light evenly across a letter face. Clear acrylic carries light through its thickness, which is how edge-lit signs work. Coloured acrylic glows in its own colour; for exact brand colours, translucent vinyl over white acrylic gives more control.
Acrylic scratches more easily than glass and can crack if cleaned with strong solvents. Use soft cloths and mild soap.
Stainless steel
Stainless steel is the default premium metal for signage. Brushed finishes hide fingerprints and small marks; mirror finishes are striking but show every smudge. Grade 304 is used for most work. Grade 316 resists corrosion better and is chosen near pools or chemicals.
PVD finishes
PVD is a coating process that bonds a thin, hard, coloured layer onto stainless steel. It is how most gold, rose gold and black metal letters are made today. It is far more durable than paint or ordinary plating, but abrasive cleaning can still mark it.
Brass
Brass gives a warm, classic look that suits hospitality and heritage settings. Left natural, it slowly darkens, which some designers want. Lacquered brass keeps its brightness for longer.
Aluminium
Aluminium is light, which matters for large letters at height, and it takes paint and powder coat well. It is the usual material for returns on front-lit letters and for large painted letters.
ACP
ACP is a panel, not a letter material. It creates the flat fascia or cladding behind the letters. Choose fire-retardant (FR) core panels for building façades, and plan the frame and joint layout carefully, because they decide how flat and neat the finished front looks.
Choosing for your site
Think about the setting as much as the look. A mirror finish facing a busy road will collect dust. Natural brass beside a pool will change quickly. If you share photos and the location, we will recommend materials that suit both the design and the conditions.