Agrax Earthshade vs Petroleum Brown Wash

How close are they?

ΔE 7.3, close: similar, with a visible difference side by side. Petroleum Brown Wash is a little darker than Agrax Earthshade.

Can I use Petroleum Brown Wash instead of Agrax Earthshade?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Petroleum Brown Wash is a little darker than Agrax Earthshade.

Can I use Agrax Earthshade instead of Petroleum Brown Wash?

The same difference applies the other way round: Agrax Earthshade is a little lighter.

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.