>>5379509I have no idea for die cast. I doubt modeling lacquer top coats will adhere well to metal. If it's poor quality die-cast it's probably just warping and wearing too quickly. My recommendation is to try elastidip if you're feeling adventurous. Sand the surface you want to coat to give it a rough finish then brush a few layers on. I have no idea how well it will stick to metal, but a rough surface will help with adherence. It dries much thinner than it actually looks so you may need to use a few layers.
Just keep in mind that the medium is toxic, so you probably want a proper respirator (same kind when using lacquer paints) if you plan to have the can open for more than a few minutes per day.
