Oil-based stains, varnish, and alkyd paints should be thinned with which solvent?

Oil-based stains, varnishes, and alkyd paints are typically thinned with turpentine due to its ability to dissolve these substances effectively. Turpentine is a solvent derived from the resin of pine trees and is particularly suitable for use with oil-based products. It enhances the flow and application of the paint or stain while maintaining the integrity of the oil base.

While paint thinner can also be used for thinning oil-based products, turpentine is often preferred for its potency and effectiveness. Acetone, on the other hand, is better suited for thinning lacquer-based finishes and is not recommended for oil-based applications. Water is impractical for oil-based materials because it does not mix with oils, rendering it ineffective as a thinning agent for these products. Thus, turpentine is the most appropriate choice for thinning oil-based stains, varnishes, and alkyd paints.