Yes, Soto's Appliance + Porcelain Touch Up can be used on a reglazed bathtub. But before doing any repair work you must ensure there is no "flaking" paint. Remove peeling paint by peeling it and/or sanding. Make sure the surface is clean of all oils and debris (you may need to vacuum, and/or wash with soap and water), and that it is completely dry.
Once the surface is adequately prepped, our Touch Up Paint should work (see more information here). Please note that because the product is water-based it does require some time to fully cure to its optimum hardness. The surface can generally be used once dry to touch, but for its full hardness properties it can take days to weeks depending on your environmental conditions.
