Japanese Rustoseums: Toyota Celica 2000GT RA25

A few days ago I asked Daniel O’Grady a similar question: why do the Japanese cars in Japan rust from the top down while they rust from the bottom up on the European soil?
Japanese Rustoseums Toyota Celica 2000 GT RA25
It is funny because I can explain the European bottom up rust: we simply put salt on our roads during wintertime to fight ice and snow. However why the cars in Japan tend to rust from the top is a mystery to me…

Anyway, this beautifully crusty brown (photographed in black and white) Toyota Celica 2000GT RA25 is a good example of the top down rust:
Japanese Rustoseums Toyota Celica 2000 GT RA25
Anyone got the answer to my question?

Found at Gagaga7310