Acetone is a strong solvent and is excellent for thinning fibreglass resins and for cleaning fibreglass repair tools, as well as dissolving two part epoxies before they set. It is also used to clean application tools for lacquer, acrylic and water based polyurethane finishing products. Acetone prevents film formation on spray gun internal components. It is also quite handy to remove sticky residues left on glass and porcelain left by price stickers and other adhesive labels.
Acetone is not suitable as a thinner for most oil based paints and coatings, since it is highly volatile and evaporates too quickly. However, by mixing it with water to reduce its strength and slowing down its evaporation rate, it can be used to clean vinyl or fibreglass surfaces.