Even if the ashtray is made of different resin, or it is painted, even then it must not have different shade from other parts, and its not about shining not shining, its actually showing poor manufacturing with poor quality or out of standard material.
This is the problem with small car manufacturers (pak suzuki and indus for cuore), they dont even bother what they are going to deliver in market at such a high cost at PDI stage at plant. And when customers move to JDMs the local assemblers start crying about their miserable conditions...