Oil paint can be messy. If cleanup is put off, it gets harder and harder (and can even ruin your paint brushes).

2. Rinse with a Cleanser Fill a container with a solvent, a natural oil, or a natural cleaner. The product varies but process stays the same. Swirl the wet brush in the solution, squish and twist ...

There’s no trade secret here—mineral spirits are a universal solvent for oil-based paint. They emit less odor than paint thinner and are considered more effective as a paint brush cleaner.