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Near the coast, rust is the number-one thing that shortens the life of a metal roof, a steel gate or an outdoor fitting. The good news: caught early it is cheap to stop. Left alone, it eats through. A little attention each year saves a lot of steel.

What you'll need

Everything here is stocked across our branches.

Step by step

  1. 1

    Find rust early — check the trouble spots

    Look where water sits and where coatings get damaged: roof screw heads and laps, cut edges, gutter joints, gate hinges, fence bases. Rust starts as a brown bloom; that is the cheap moment to deal with it.

  2. 2

    Remove the loose rust

    Wire-brush, scrape or sand back to sound metal, removing all flaking rust and loose old paint. The treatment only works on what you have cleaned back to; painting over active flaking rust just hides it while it keeps spreading.

  3. 3

    Treat bare and rusted metal

    On cleaned rusty steel, apply a rust converter/rust-killing primer, which stabilises what is left and gives a surface to paint. On bright bare steel, use a metal primer. Cut edges of galvanised or Colorbond sheet should get a cold-galvanising touch-up.

  4. 4

    Top-coat to protect it

    Once primed, apply a suitable metal/roofing top-coat. Two thinner coats beat one thick one. This is the layer that keeps the salt air and rain off the steel, so do not skip it.

  5. 5

    Keep it up — a yearly look, especially near the sea

    Rinse salt off coastal metalwork occasionally, keep gutters clear, and touch up any new chips and scratches before they bloom. A yearly check and a small tin of touch-up paint is far cheaper than replacing rusted steel.

Tips for the PNG climate

  • Catch it early. A brown bloom is a five-minute job; a rusted-through sheet or gate is a replacement.
  • Always treat cut edges and screw holes — that is where the protective coating is thinnest and rust starts.
  • Near the sea, rinsing salt off metalwork now and then genuinely extends its life; salt left on steel keeps corroding it.
  • Two thin coats of primer and top-coat protect better and last longer than one thick, runny coat.

Common questions

Can I just paint over rust?
No — painting over active, flaking rust hides it while it keeps eating the steel. Clean back to sound metal, treat with a rust converter/primer, then top-coat.
What causes roofs and fittings to rust so fast here?
Humidity and coastal salt air, plus water sitting at laps, cut edges and screw holes. Use corrosion-resistant coatings and fixings, and treat any damage early.
What do I need to fix a rusty gate or roof edge?
A wire brush, a rust converter/metal primer, a suitable top-coat, and for cut galvanised edges a cold-galv touch-up. The branch stocks all of it.

Ready to start?

Add what you need to an enquiry and choose your nearest branch. We confirm the price and what is in stock before you travel — fourteen branches in ten locations.

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