Vintage Bathtub Restoration/Reglazing Service & Kit

The user is obsessively trying to clean a seemingly clean 1936 tub, believing there's a 'film' or 'streaks' while her husband experiences chemical burns from over-cleaning. Many comments suggest the tub's porcelain glaze is likely damaged or worn, leading to perceived dirtiness and chemical absorption. There's a strong demand for professional reglazing/refinishing services for vintage tubs, or a DIY kit that safely and effectively restores the surface without harsh chemicals, making it look new and preventing chemical residue. A product that helps diagnose if a tub needs cleaning versus resurfacing could also be valuable.