What preservation controversy developed over the years relating to Michelangelo's paintings in the Sistine chapel?

The preservation controversy surrounding Michelangelo's paintings in the Sistine Chapel primarily centers on the methods used during restoration efforts, particularly the significant restoration completed in the 1990s. Critics argued that the cleaning process removed centuries of soot and grime, leading to a loss of original colors and details, while others contended that the restoration revealed Michelangelo's true intention and brilliance. The debate reflects broader tensions in art conservation regarding the balance between preserving historical authenticity and enhancing visibility. This controversy continues to influence discussions about restoration practices in art conservation.