Schofields Building
Inspections

Paint that attacks the metal underneath it

A coating chosen for colour, not compatibility.

Schofields 2762 · 19 February 2026

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In short: Corrosive paint on metal components recorded on Schofields lock-ups.

The chemistry in one line

Some coatings react with galvanising and other protective finishes, breaking down the layer that was keeping the metal intact.

What we recorded

Corrosive paint applied to metal components on three separate Schofields lock-up records.

Why it goes unnoticed

It looks like paint. The reaction is slow, and by the time it shows the component is inside a wall.

Where it matters most

On structural or fixing hardware, where the metal is doing a job and nobody will ever look at it again.

The fix at the time

Remove and recoat with a compatible product, which is trivial while the frame is open.

Written by our local inspection team from work carried out in Schofields. Licensed building practitioners.

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FAQ

Questions Schofields owners ask about this

How do you identify it?

By what has been applied against what the component requires. It is a specification question rather than a visual one.

Is it structural?

It can become so, if the component is structural and the protection fails early enough.

Is it common?

Uncommon, which is part of why it is worth recording when it appears.

Is remedy possible once the linings are up?

Not realistically. It joins the list of things that are cheap now and impossible later.

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