Mineral spirits or turpentine for oil-based paints; warm water and dish soap for water-based latex paints.

Mineral Spirits / Paint Thinner: Used to thin oil-based paints, varnishes, and enamels, as well as soak and clean brushes used with oil paint.
Acetone or Lacquer Thinner: Heavy-duty fast-evaporating solvents used to dissolve dried lacquer, stubborn paint splatters, or residue from metal surfaces and equipment.
Liquid Brush Cleaners & Restorers: Specialty soaps or chemical dips designed to soften and remove dried latex or acrylic paint hardened onto brush bristles.
Warm Soap & Water (for Water-Based Latex): Standard latex/acrylic paints do not require chemical solvents and clean up easily with water and mild detergent.