Refinish Tub or rip and replace?

[Aaron White]

I paid a contractor to refinish a tub two years ago and after one year it had started chipping paint. He said to not use mats on the tub and that is why it was chipping the paint. I paid him to refinish it again and it is now chipping again. 

Is re-finishing tubs and sinks a good idea? If so what do I need to ask my contractor to know if they are going to do it right?

Or is it better to just rip it out and replace the tub?