Final answer:
Encaustic paints are durable due to the hardened beeswax-resin mixture; however, they can be damaged by extreme heat and direct light, requiring careful preservation.
Step-by-step explanation:
Encaustic paints are known for their durability due to the combination of pigments with beeswax and resin. These components create a composition that, when cooled, produces a hard, protective skin. Encaustic techniques date back to antiquity, highlighted by the Fayum mummy portraits, which display resilience over centuries and remain in good condition today. While the wax-based medium is indeed durable, it must also be noted that it is susceptible to damage from excessive heat and direct light. These factors can soften or alter the wax, potentially leading to deterioration. Therefore, proper care and protection from heat and light are essential for the preservation of encaustic artworks.