His paintings are characterized by intense colours, expressive brushwork, and recurring figures — most notably #SPRKL, a character that merges raw emotion with a sense of playful rebellion. Influenced by Art Brut, childhood imagination, and the spontaneity of graffiti, his work features abstract forms, faces, and symbols that feel both deeply personal and instantly recognizable.
Kostabi works across media and surfaces, from traditional canvas to found materials like shipping crates once used to transport major artworks. His approach is intuitive and energetic, often combining elements of fine art and underground culture. Over the years, his visual art has appeared in international exhibitions and entered the collections of major institutions, including the Guggenheim Museum and Museion in Italy.