[Dadsktruck]

I went to a salvage yard in dry Arizona that had several 60-66 K1000 vehicles and they all had that rust line. So much for my thought that I could get an OEM fender that might be better quality than the after markets. There’s a brace on the back side that almost, but not quite touches the fender behind that rust line. Must be a moisture trap or? I’m betting that many on this forum are all to familiar with this problem. Even though my inherited truck spent time on Nebraska winter roads, that’s the only significant rust except for a some in the ‘eyebrow’ of the left rear fender.