Hellblau RLM 65 vs Rus. AF Grey Prot. Coat

How close are they?

ΔE 7.8, close: similar, with a visible difference side by side. Rus. AF Grey Prot. Coat is a little darker, cooler than Hellblau RLM 65.

Can I use Rus. AF Grey Prot. Coat instead of Hellblau RLM 65?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Rus. AF Grey Prot. Coat is a little darker, cooler than Hellblau RLM 65.

Can I use Hellblau RLM 65 instead of Rus. AF Grey Prot. Coat?

The same difference applies the other way round: Hellblau RLM 65 is a little lighter, warmer.

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.