Recent MOT has an advisory that the rear lower suspension arm is coroded.

The car is 15 years old, and there is corrosion on many of the components underneath, but as everything seems pretty chunky and solid it's only really been surface rust, with no real impact (apart from the fuel tank cradle that I replaced).

There's no problem with the bushes etc so I was thinking of leaving the arms, any other experience of this? If it's a safety issue I'll replace it, but don't want to throw money at it if not really required.

Rotary wire brush, coat of black paint, another 12 months of dirt and next time nothing will be said. 2019 5.0 SC SVA (Current)
2012 5.0 SC AB. Sadly written off by a campervan
23 plate Focus ST (Current)
1942 VEP Ford GPW Jeep (Willys) (Current)
1943 Whites M16 Halftrack (Current)
16 plate Eurofighter Typhoon, 2 x Eurojet engines with 20,000lbs thrust each. 1380mph

That’s what I was thinking