Typical rear window rust that we see here on the bottom and corners. We have tons of dust that lays in that channel and becomes a wet paste when it gets wet and just lays there. The car was outdoors and uncovered until I got it 1995.
69.5 A12 Bee, first purchased in 1976, car 169 on registry
69 Coronet R/T 440/4 spd
69 Coronet 500 Conv H code 383 4bbl/auto
37 Plymouth PU
Find your spot on earth and ride it.