Tub Refinish or Replace?

[Jonathan Johnson]

Hello BP,

I got 4 tubs that look like these two:

They are cast iron tubs and I have some money for repairs. I care more about saving money than time at my current stage. The bathroom sinks look similar and need replaced as well, but I think I can do that for about  $30 each. The tubs are a significant project. I could reasonably figure out a lot of repair stuff but I wanted to ask you all if you have had any experience with this type of stuff?