There are people out there who go around and repair porcelain sinks and tubs, and fiberglass, You could try the home repair kit but they don't work that good, I fixed a brand new tub with epoxy paint that just happened to be the exact color. When the pros come to your house, they set up infrared and UV lights, mix up a little stuff, put it on the re and hit the lights, you can't even tell where it was chipped! But they don't come cheap. Hope this helps.
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There are people out there who go around and repair porcelain sinks and tubs, and fiberglass, You could try the home repair kit but they don't work that good, I fixed a brand new tub with epoxy paint that just happened to be the exact color. When the pros come to your house, they set up infrared and UV lights, mix up a little stuff, put it on the re and hit the lights, you can't even tell where it was chipped! But they don't come cheap. Hope this helps.