Yes mate quite likely. That said the metal underneath seemed pristine and I couldn't see any real problem from behind with the lamp cluster out. I think in my case some surface rust had developed on the seam in the light cluster cavity and had managed to gradually work it's way under the paint. Definitely doesnt seem to be the case the whole panel is being eaten....but that's only what I can see. Will keep an eye on it and look to get it addressed in future if it persists to be an issueYou probably need to get that cut out and new metal welded in. They rust from inside out. Surface repairs won't work and as you know end up being a waste of time and money.
A larger rust patch under my rear light turned out to be the result of surface fixing that never addressed the source of the rust. Became a much bigger job.
And an LSD whilst it's apart.... 😁Scope of the maintenance has changed a little......I've decided not to do the crank pulley damper and front main seal as already spending a small fortune on the thing and my mate said it wasnt worth doing at this point just because (as it looks just fine). I figure at some point I have to draw the line.
Am going to get the PCV valve changed for an OE one however.
I figure once the clutch needs doing I might well do it all then along with the rear main seal......