Which finish do I need?
| Finish | Outdoors | Colour | Relative cost | Best for |
|---|---|---|---|---|
| Shop primer | Internal only | Site paint over | Lowest | Hidden internal steel |
| Hot-dip galvanising | Excellent | Silver-grey only | Medium | External steel, balconies, stairs, gates |
| Powder coating | Fair on its own | Any RAL colour | Medium | Internal feature metalwork |
| Galvanised and powder coated | Excellent | Any RAL colour | Higher | External steel that needs a colour |
| Intumescent | With a sealer coat | Top-coat colour | Higher | Steel that needs fire resistance |
Relative guidance only. Read the full guide: Galvanising or powder coating?
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