wurlycorner wrote:If it's got noticeably worse in that time, you have water actively getting in there.
I would just ask a body shop what they would want to do to stop it.
They might say it's as much work to cut out that area, fab up a repair patch and weld in, as it is to replace the whole panel with a pre-stamped one?
But the sunroof drains are clear. How is water getting there? I will see what the bodyshop says.