Rust in Peace vs Knight-Questor Flesh

How close are they?

ΔE 12.5, fair: the same colour family, but not a straight swap. Knight-Questor Flesh is a little darker, more saturated than Rust in Peace.

Can I use Knight-Questor Flesh instead of Rust in Peace?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 13). Knight-Questor Flesh is a little darker, more saturated than Rust in Peace.

Can I use Rust in Peace instead of Knight-Questor Flesh?

The same difference applies the other way round: Rust in Peace is a little lighter, 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.