Decayed Metal vs Bronze

How close are they?

ΔE 6.8, close: similar, with a visible difference side by side. Bronze is more saturated, cooler than Decayed Metal.

Can I use Bronze instead of Decayed Metal?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Bronze is more saturated, cooler than Decayed Metal.

Can I use Decayed Metal instead of Bronze?

The same difference applies the other way round: Decayed Metal is more muted, warmer.

ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.