Why does Banksy use spray paint?

Banksy uses spray paint as a medium for its accessibility and immediacy, allowing him to create art quickly in public spaces. The technique aligns with his guerrilla art style, emphasizing spontaneity and social commentary. Additionally, spray paint's association with street art and graffiti culture reflects his desire to challenge traditional art norms and engage with broader audiences. Ultimately, it serves as a tool for both expression and activism.