Necro Gold vs Aged Metal

How close are they?

ΔE 9.1, close: similar, with a visible difference side by side. Aged Metal is a little lighter, more saturated than Necro Gold.

Can I use Aged Metal instead of Necro Gold?

Usually, if you are not matching paint already on the model. Close match (ΔE 9). Aged Metal is a little lighter, more saturated than Necro Gold.

Can I use Necro Gold instead of Aged Metal?

The same difference applies the other way round: Necro Gold is a little darker, more muted.

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.