The scuttle in 6Ns is rarely the cause of water ingress, as it has two pretty large drains that never get blocked. Said drains lead behind the arch liners, which are drained through the tiniest of holes and are therefore a massive mud trap. A buildup of mud in that area often results in the lowermost part of the wing rusting through. For reasons that I never understood, the bottom of the A pillar rarely suffers the same fate.
The front sunroof drains don't drain in the same area in 6Ns, you can see their ends in the door jamb, by the lower corners of the screen. A squirt of WD40 and a blow through with the airline are usually enough to clear them.