Statue of Liberty and about two percent of the exterior plates needed to be replaced. Although problems with the armature had been recognized as early as 1936, when cast iron replacements for some of the bars had been installed, much of the corrosion had been hidden by layers of paint applied over the years. In May 1982, President Ronald Reagan announced the formation of the Statue of Liberty–Ellis Island Centennial Commission, led by Chrysler Corporation chair Lee Iacocca, to raise the funds needed to complete the work. Through its fundraising arm, the Statue of Liberty–Ellis Island Foundation, Inc., the group raised more than
Statue of Liberty of the copper skin over decades, leaving two layers of coal tar, originally applied to plug leaks and prevent corrosion. Blasting with baking soda powder removed the tar without further damaging the copper. The restorers' work was hampered by the asbestos-based substance that Bartholdi had used—ineffectively, as inspections showed—to prevent galvanic corrosion. Workers within the statue had to wear protective gear, dubbed "moon suits", with self-contained breathing circuits. Larger holes in the copper skin were repaired, and new copper was added where necessary. The replacement skin was taken from a copper rooftop at Bell Labs, which had a patina that