There are several types of paint refills available :

1. Oil-based paint refills: These are commonly used for industrial applications and can be used on a variety of surfaces, including metal, wood, and plastic.
2. Water-based paint refills: These are popular for use in arts and crafts, and are often used on paper, canvas, and other porous surfaces.
3. Acrylic paint refills: These are similar to water-based paints, but offer a more durable finish that can withstand exposure to the elements.
4. Alcohol-based paint refills: These are commonly used in the automotive industry and for other applications that require a fast-drying, solvent-based paint.
5. Chalk-based paint refills: These are popular for use in furniture restoration and other DIY projects, and offer a matte, vintage-style finish.

It is important to choose the right type of paint refill for the desired application, as different formulations may perform differently on different surfaces and may have different drying times, durability, and other properties