Hello: water leaking on ceiling beneath bathtub. After removing drain noticed a small hole had rusted through (about 3mm x 1mm) under the lip of the drain cap. Attached pic to try and illustrate.
?: Plumber told me just to re-wax and would seal up. Is this ok?
? What about using silicone caulk to plug hole?
? Or, what about using a porcelain chip kit?
? Or, finally, b/c replacing tub is just too costly right now, what about an epoxy filler?