hello!
we love your works!
we guess you might mean "rustic" ? it is not the same as 錆 rusty - that usually *also* implies "falling apart" in english, and these all look very well kept! that is not always true - however on this site, "rusty" is usually in apocalypse / horror type titles. if you did mean "tarnished" then maybe "worn" or "older" or "weathered" might work
good luck!