Leadbelcher vs Burnt Iron

How close are they?

ΔE 6.9, close: similar, with a visible difference side by side. Burnt Iron is more saturated than Leadbelcher.

Can I use Burnt Iron instead of Leadbelcher?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Burnt Iron is more saturated than Leadbelcher.

Can I use Leadbelcher instead of Burnt Iron?

The same difference applies the other way round: Leadbelcher is 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.