I own a condo that my daughter and son-in-law live in that was built in the 70's. The tub is starting to get scratched and pretty nasty looking from years of use. I was thinking of replacing it but how much trouble will I have getting a new tub in there without taking a wall down? With all the horror stories about some of the coating or covering companies is replacement my best option? It is a cast iron/porcelain unit.