RLM 70 vs Bleached Strap Grey

How close are they?

ΔE 7.9, close: similar, with a visible difference side by side. Bleached Strap Grey is a little darker, more muted than RLM 70.

Can I use Bleached Strap Grey instead of RLM 70?

Usually, if you are not matching paint already on the model. Close match (ΔE 8). Bleached Strap Grey is a little darker, more muted than RLM 70.

Can I use RLM 70 instead of Bleached Strap Grey?

The same difference applies the other way round: RLM 70 is a little lighter, 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.