| The "snaking" as you call it is corrosion. If it's only narrow track snaking, then it's not too bad. Any worse and they need immediate attention. This is not to say that they are knackered, simply that the corrosion is more advanced. Either way for peace of mind have them renovated as soon as you can to stop further deterioration.
Magnesium corrodes much more quickly than most other alloys, so you can't afford to ignore the signs. If you want proof, use a craft knife to pick a little of the paint off a snake track and see what's underneath. My bet is a white powdery appearance to the surface. Afterwards you can make good with a touch up paint stick.
Hope this helps, and you are not alone!!! |