What are you thinning AK 3rd Gen with?
ammo-by-mig-or-ak-3rd-gen-which-and-why
My impression with minor airbrushing of AK 3rd Gen is when thinned with laquer paint thinner is it bites and adheres more or less like an enamel.
Not an AK 3rd Gen user, just a dedicated old school Floquil Military Colors & Floquil RailRoad modeler that dabbles with the newer stuff on occasion.