ΔE 11.7, fair: the same colour family, but not a straight swap. Rus. AF Grey Prot. Coat is more muted than Neptune Glow.
Only where an exact match doesn’t matter, such as a new unit or a highlight. Fair match (ΔE 12). Rus. AF Grey Prot. Coat is more muted than Neptune Glow.
The same difference applies the other way round: Neptune Glow is 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.
See Neptune Glow on the colour wheel See Rus. AF Grey Prot. Coat on the colour wheel
All matches: Neptune Glow equivalents · Rus. AF Grey Prot. Coat equivalents