Red Primer vs Ratskin Flesh

How close are they?

ΔE 8.4, close: similar, with a visible difference side by side. Ratskin Flesh is a little lighter, more muted than Red Primer.

Can I use Ratskin Flesh instead of Red Primer?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Ratskin Flesh is a little lighter, more muted than Red Primer.

Can I use Red Primer instead of Ratskin Flesh?

The same difference applies the other way round: Red Primer is a little darker, 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.