So an update from my dealer regarding my issues, which might be of interest to Chris2000tii.
......., they have "started at the rear of the car looking to replace components that have seen an upgrade in quality of component. e.g. the exhaust hanger and replaced any other parts that showed any sign of corrosion they then covered the components with anti corrosion coating". So the factory must be concerned about underpinnings not being sufficiently protected against corrosion. I was surprised to hear about the exhaust hanger being upgraded, I didn't know there was an issue with them.
I would ask them for details of the coatings they've applied and the process they've followed. Any corroded or inadequately coated components should be removed from the car and then blasted/powder-coated/painted or whatever is appropriate. The easy route is for them to slap a proprietary product on top of the sub-standard coating, which is not what you want.
I'd also request a written explanation as to why the coating is failing after a few days and whether the same coating is applied to other elements of the car. The last thing anyone wants is coating issues, on less exposed parts of the structure, which may fail further down the line and be more difficult to claim against due to the time factor.
