u/Mad-cat0

Hi i'm very new to airbrushing, I recently bought the Serenair kit and a bottle of Kaleido gray primer for a tank I’m going to paint; it has a metal barrel, metal tracks and photo etch parts.

I’ve practiced on spare parts, but the primer always peels off very easily when scratched with a fingernail, especially on the metal. I don't think it's the model material or the paint, it's probably a skill issue from me.

I’ve tried a few things, like washing the surface with soapy water and lightly sanding it; that helped a bit, but it still scratches easily.

Thanks in advance for any advice you can give me.