N8 Neutral Gray vs Liquid Mask

How close are they?

ΔE 6.1, close: similar, with a visible difference side by side. Liquid Mask is a little lighter than N8 Neutral Gray.

Can I use Liquid Mask instead of N8 Neutral Gray?

Usually, if you are not matching paint already on the model. Close match (ΔE 6). Liquid Mask is a little lighter than N8 Neutral Gray.

Can I use N8 Neutral Gray instead of Liquid Mask?

The same difference applies the other way round: N8 Neutral Gray is a little darker.

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.