What is typically used to thin oil-based paints?

Mineral spirits are typically used to thin oil-based paints due to their effectiveness in dissolving oils and resins found in these types of paints. They are a petroleum-derived solvent that can reduce the viscosity of the paint, making it easier to apply and providing a smoother finish. Moreover, mineral spirits help to clean brushes and equipment used with oil-based paints, ensuring that the tools are not damaged and can be reused effectively.

Water, while a common thinner for water-based paints, does not mix well with oil-based paints, which can lead to uneven application and poor results. Acetone is primarily used to thin certain types of coatings, such as lacquers and some adhesives, but is not recommended for thinning oil-based paints. It evaporates quickly and may alter the properties of the paint. Alcohol, on the other hand, is better suited for thinning shellac and some types of inks, not oil-based paints, where mineral spirits remain the appropriate choice.