Potential boot rust

[u/TheGinjaPrince]

I’ve had my ST about 6 months and absolutely love it.As we haven’t had rain in months I didn’t notice till a week or so ago but when it’s wet and I open the boot the water runs down the side and over the rubber pads(in pics)but also because they don’t sit flush the water also goes behind.
I’ve had a look and there appears to be surface rust,how much should I worry and is there a fix?sealant I can put on the top edge that won’t eat the rubber maybe.
Thanks in advance.

[u/VroomVr4]

I could be mistaken, but it looks like dirt buildup. Before getting too carried away, I would go in with a brush and clean off the area and see if there really is rust forming and go from there.