This unique Hardened Shellac creates a film with a high resistance to heat, water and alcohol, yet it is used in exactly the same was as any normal shellac. It can be applied with a rubber as French polish, brushed, sprayed and dipped.After shellac has been dissolved in ethanol. USES: Ideal for table tops and other horizontal surfaces such as dresser and desk tops, etc. Also brilliant for use on guitars, lutes, harps and many other musical instruments where a traditional finish is required and good resonance qualities are essential.