Both of our safes took on water with the recent hurricane and my large one is scheduled to be picked up and taken to Houston to be rebuilt on the interior. The wife's on the other hand was not worth the two way trip and cost to refurbish as it would come in right at the cost of replacement. Decided to tackle it myself. Gutted it and scraped out all remaining fire rock, cleaned up a little rust to the waterline and coated the affected areas and bottom with POR15. Glued in some 1/4 inch drywall to allow an air gap (not sure if that helps) and then two full layers of 5/8 fire rated drywall.