The company's core activity encompasses three main areas: 1. Property Maintenance: The company offers services for the maintenance and care of houses and properties. 2. Metal Art: It creates and processes metal artworks, indicating a creative and artisanal activity. 3. Sandblasting: The company provides sandblasting services, likely used for cleaning and processing surfaces. Overall, the company's core activity can be described as a combination of artisanal services for property maintenance, creative metal processing, and surface treatment through sandblasting.