Enhancing the appearance and durability of your engraved coasters can be achieved through several methods. Firstly, applying a protective sealant can significantly increase their durability. Choose a clear polyurethane or epoxy resin that is compatible with the material of your coasters, whether wood, stone, or acrylic. This will protect them from moisture and wear while enhancing their look.

Secondly, consider adding a finish or stain. For wooden coasters, a stain can enrich the color and grain of the wood, making the engraving stand out even more. Ensure the stain is fully dry before applying any sealant.

For a decorative touch, you might add felt pads to the bottom of each coaster to prevent scratching on surfaces and enhance comfort. This not only increases function but also adds an elegant finishing touch.

Lastly, regular maintenance is key. Wipe coasters with a damp cloth and avoid harsh chemicals that can degrade the finish over time. By combining these techniques, your engraved coasters will not only look stunning but also last for years to come.