also check for rust under the stainless trim (treadplate?) only three small screws to undo, and the stainless trim at the front pillar (a-post) bit more akward to get off as it is pop rivited in place but can be re-fitted using stainless self tappers, behind there can get bunged up with leaf debris etc not allowing water to drain away effectivley.
I say my S2 is BRG as I don't know what it was resprayed over from the original Arden Green, but it could be Sage as it looks similar to your colour, which is nice btw.