1. Polyurethane resin: It has the characteristics of high strength, high hardness, corrosion resistance and oxidation resistance.
2. Additives: Commonly used additives include calcium stearate and silicon dioxide, which can increase the luster and protective performance of piano paint.
3. Polishing agent: A colorless, transparent, odorless, nontoxic and nonflammable liquid, which is used to improve the gloss of piano paint surface.