Here is an example of a Chinese-made inexpensive acrylic piano a couple of years into amortization. You are seeing hairline cracks in the surface of acrylic – which is the result of the molecular disintegration of the acrylic over time. The subpar ingredients are unable to structurally sustain the material, which results in visible and irreversible deterioration.
Most Chinese acrylic pianos only offer a 5-year warranty, if at all and usually it does not cover cosmetic imperfections, which are, of course, the symptom of a larger problem with the material itself. Essentially, the budget acrylic is a time-bomb as far as quality is concerned, for even if it looks fine at the time of the purchase the chemical compounds used are already at work breaking the molecular structure of the acrylic down.
Lucid Pianos uses a proprietary formula that was developed by German medical researchers and is the clearest, strongest, and most durable acrylic available on the market. It doesn’t change color over time, and its light conductivity (transparency) remains at the high 90%. That is what it comes with a 30-years warranty.