Interference Orange (Fine) vs Aluminium (Metal.)

How close are they?

ΔE 6.3, close: similar, with a visible difference side by side. Aluminium (Metal.) is more muted than Interference Orange (Fine). They are different kinds of paint: Golden Interference Orange (Fine) is a pearl paint and Vallejo Aluminium (Metal.) is a metallic, so they won’t behave the same on the model even where the colour is close.

Can I use Aluminium (Metal.) instead of Interference Orange (Fine)?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Aluminium (Metal.) is more muted than Interference Orange (Fine). They are different kinds of paint.

Can I use Interference Orange (Fine) instead of Aluminium (Metal.)?

The same difference applies the other way round: Interference Orange (Fine) is more saturated.

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.