LOL  , well , that explains why I couldn't find anything about it anywhere .

That paint pot you posted above def wasn't Tamiya , and they don't make a " rust " paint .

I was really scratching my head .

This one then :

[ATTACH=full]116260[/ATTACH]

Paint is Probably :

 https://www.hobbylinc.com/revell-germany-18ml-bottle-acrylic-rust-mat-aqua-color-hobby-and-model-acrylic-paint-36183

Acrylic , right ?

if not , this is their rust enamel : https://www.hobbylinc.com/revell-germany-14ml-enamel-rust-mat-tinlets-hobby-and-model-enamel-paint-32183