Just a heads up for a simple, very nice way to make baterry corrosion.
50/50 mix of PVA glue (Elmers) and water, with just a hint of flat black acrylic (like the lightest wash mix).
Brush on over terminals, sprinkle baking soda to suit.
When it dries it, looks great. You can spray a flat clearcoat once its thouroughly dry.