Burnt Iron vs Rough Iron

How close are they?

ΔE 9.7, close: similar, with a visible difference side by side. Rough Iron is more muted than Burnt Iron.

Can I use Rough Iron instead of Burnt Iron?

Usually, if you are not matching paint already on the model. Close match (ΔE 10). Rough Iron is more muted than Burnt Iron.

Can I use Burnt Iron instead of Rough Iron?

The same difference applies the other way round: Burnt Iron 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.