What are the challenges of creating non-slip surfaces on polished granite outdoor trash cans?

Polished granite outdoor trash cans are prized for their aesthetic appeal and durability in public spaces, but their smooth surfaces present significant slip hazards, especially when wet. The primary challenge lies in altering the granite's naturally slick finish without compromising its visual integrity or structural strength. Common methods like abrasive blasting or chemical etching can reduce slipperiness but may lead to increased porosity, making the surface more susceptible to staining and weathering over time. Adhesive non-slip coatings offer another solution, but they often wear off quickly under heavy use and exposure to UV rays and harsh weather conditions, requiring frequent reapplication. Additionally, the integration of non-slip materials must account for thermal expansion differences between granite and applied coatings to prevent cracking or delamination. Cost is another major factor, as developing long-lasting, non-slip treatments that maintain the granite's elegant look often involves expensive materials and specialized application techniques. Ultimately, balancing safety, aesthetics, durability, and affordability remains a complex hurdle for manufacturers and urban planners seeking to enhance the functionality of these elegant outdoor fixtures.