WHEN THE COSULTANT CAME OUT FROM NUBATH AND LOOKED AT OUR TUB WHICH WAS AN OLDER TUB IN A HOME WE WERE REMODELING THAT WAS BUILT IN THE 50s HE RECOMENDED THAT WE PUT A LINER IN THE TUB. THE BOTTOM OF THE TUB HAD A LOT OF RUST.I QUESTIONED HIM ABOUT THIS AND HE SAID IT WOULD NOT RUST THRU WITH A LINER ON TOP OF IT IAM NOT STUPID OR AM I?