red8 - Yes, you can reglaze the bathtub, but I think in some cases, reglazing won't help at all, so you need to ask professionals.

jeremy51 - Have you ever heard of eco-renovation? This is when we don't throw away what we can fix and make almost new. It's the same story with the bathtub, I advise you to contact https://azreglazing.com/. They are real professionals in their field, so you will get a beautifully refinished bathtub