Replace while you have the chance, I speak from experience.

The spraying is just a stop gap and IMO change it now or be prepared to make a huge mess later.

The glazing holds up for about 3-5 years, then you'll need to replace. I would do it now while you're remodeling.

Thank you so much for your comments. While I was at the tile shop today, the sales person told me that over the years she’s worked with many people who wish they would’ve just replaced the tub when they had a chance. I think that is important with a completely gutted bathroom.

I actually called Kohler today too. They were very helpful. They have some Kohler approved “refinishing“ companies for cast-iron tubs. However, there were none near me. I asked about the spray type of refinishing and she said they don’t recommend it. She told me to Google refinishing cast-iron tubs and all that came up was Miracle Method and the other companies. I might call again tomorrow just out of curiosity to find out who their approved companies are, even though there is not one near me in Minneapolis, just to find out what kind of company they are.

I did address one other issue that I had read about and that is that the new cast-iron tubs have a slight wave to them as in they are not completely flat. The sides look like a slight ripple like finish. She said some tubs are worse than others. She told me the reason for that is over the years they have changed what goes into the cast-iron tubs. That’s when she said if I really wanted to keep the one I have to find someone to refinish it. She wasn’t specific about what used to be in it versus what is in it now but I thought that was interesting too.

All of this to say, I’m just gonna buy a new tub. I’d rather save the money but as the old saying goes I don’t wanna be penny wise pound foolish. I’m going to go with a Kohler bellwether. I like that it is low to the ground but has clean lines. Easy to step over but still a bath if you need it. And it’s a beloved cast iron tub!

Years ago we had a very old tub refinished in a condo that we owned. Four years after it was refinished it was starting to have some issues. Glad we sold the place before it failed even more.

Last spring we replaced a one piece acrylic tub/shower unit in our hall bath with a Kohler Bellwether tub. The tub was under $700. We love the way it looks, no ripples or waves.