How Do I Paint an Exterior Metal Fence?
Old metal railings, and other exterior metalwork needs regular care and attention to prevent decay.
Regular finishing of ironwork and wrought iron such as railings and gates is essential to avoid rusting and decay caused by exposure to air and water.
Good preparation of the surface is essential and all loose paint and rust must be removed first.
- Use a steel brush to get rid of all loose and old flaking layers of paint. This is important – the new paint won’t bond with the existing paint and protect the metal unless the railings are cleaned of loose rust and unsound paint. Brush away heavy algae growth and treat with a mould removal solution, then leave for 24 hours and rinse off.
- Check the bottom of the railings, scrape away moss and clear away weeds. Sometimes there is a gap between the brick plinth and the bar at the bottom where debris can collect. This becomes a moisture trap encouraging corrosion as the metal never has the opportunity to dry out. Investigate and clean with the scraper.
- Existing paintwork must be ‘keyed’ or roughened with medium-grade abrasive paper to create good adhesion for the new paint. Wet and dry paper used with water prevents the paper from ‘clogging’. Wet sanding is also advisable as it reduces dust. For a smooth finish rub around the edges to avoid ‘steps’ on the new paintwork.
- Apply primer if required:
- Rostex Super Metal Primer (on new metal or spot prime on rusted areas)
- Temaprime EE (is galvanised or where subject to corrosion)
- Apply topcoat x 2
- Unica Akva
- Unica Semi-Gloss Enamel
- Temalac FD 20, Temalac FD50 or Temalac FD80, depending on the sheen level required
- Miranol
If you require more advice on painting over metal fencing, give our technical team a call on 0131 334 4999 or send them a message here
