AMMO by MIG Accessories - Masking for Modelling

Item: Paint Crack Effects Airbrush Stencils

From the Manufacturer:

Material: Kraft paper

How to use: Spray the leak close to the surface of the model and just spray it.

Maintenance:

It can be put in a plastic bag, washed with pen-washing liquid, and allowed to dry naturally.

If the leaked spray paper is bent and deformed, it can be ironed with an electric iron.