On August 10, 1998, a 20-ton section of the Titanic's hull, known as the "Big Piece," was raised, and while it was conserved, it was not repainted.

Here's a more detailed explanation:

The "Big Piece" and its conservation:

The "Big Piece" is a significant section of the Titanic's hull, raised in 1998.

Conservation Process:

The artifact was conserved by LP3 Conservation from France and EverGreene Architectural Arts.

Cleaning and Preservation:

The conservation process involved removing loose corrosion and rusticles using a 3,000-psi water jet, drying with propane torches, and hand-picking debris.

Rust Neutralization:

To neutralize the rust, conservationists applied a 5% tannic acid solution and hot waxed the piece.

Bronze Elements:

The bronze elements, such as the windows, were left with their original paint residue intact.

No Repainting:

The conservation efforts focused on stabilizing the artifact without compromising its desirable patina, and therefore, the "Big Piece" was not repainted.