Odorox hydroxyl generators are patented, scientifically confirmed, safety tested, and field proven to eliminate odors that have been absorbed in porous materials.  Most importantly, they will not damage any sensitive materials or leave behind any residue.  Odorox primarily sells and rents the hydroxyl generators to the disaster restoration industry throughout the world, and was recently used to eliminate smoke odors from over one billion dollars worth of artwork.  The project was a complete success with no adverse effects.