Spaceship Exterior vs Nuclear White

How close are they?

ΔE 13.6, fair: the same colour family, but not a straight swap. Nuclear White is noticeably lighter than Spaceship Exterior.

Can I use Nuclear White instead of Spaceship Exterior?

Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 14). Nuclear White is noticeably lighter than Spaceship Exterior.

Can I use Spaceship Exterior instead of Nuclear White?

The same difference applies the other way round: Spaceship Exterior is noticeably 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.