RUST NEVER SLEEPS
Although the trailer frame is less of a safety issue, now’s a good time to examine it. Check everywhere for rust, especially inside the trailer box sections, in corners where water can be trapped, the wheel studs, under the mudguards and anywhere there is rubbing on the galvanising.
Small pockets of rust are not serious but should be dealt with. Remove the rust with a wire brush, and apply a suitable rust-preventative coating. A galvanised spray paint with a high zinc content should be used, and this needs to be applied to freshly-cleaned steel.
Alternatively, a transparent coating like Lanocoat or similar, which keeps the water out, can be used as a preventative in high-risk areas such as between the leaf springs. Note: significant patches of rust will cause the trailer to fail its WOF, so get onto these early.
LEFT, ABOVE & BELOW Insidious and unrelenting, rust is a never-ending issue. Catch it before the problem becomes terminal.