Indonesia Green Sandstone can be used in exterior applications in dusty climates, but it is important to consider a few factors.

First, it is recommended to choose a finish that is suitable for the exterior environment. A honed or sandblasted finish is recommended as it can help reduce the visibility of dust and provide better traction. A polished finish may show dust more easily and can become slippery when wet.

Second, regular cleaning and maintenance will be necessary to keep the stone looking its best in a dusty climate. It is advisable to use a gentle cleanser and a soft brush or cloth to remove dust and dirt. Avoid using harsh chemicals or abrasive materials that could damage the stone.

Lastly, it is important to properly seal the sandstone to protect it from dust, stains, and other environmental elements. A high-quality penetrating sealer should be applied to the stone to create a protective barrier. The sealer should be reapplied periodically according to the manufacturers instructions.

By considering these factors and taking appropriate care, Indonesia Green Sandstone can be successfully used in exterior applications in very dusty climates.