My tub is 50 years old and just looks dingy all the time. I have tried everything.
I use Easy Off Oven Cleaner in the blue can on my fiberglass tub. It is amazing.
Is this going to damage the finish, I have a 3 piece shower surround also.
No, Easy Off No Fume Oven Cleaner does not hurt the finish. Works on enamel, porcelain, and fiberglass. If that doesn't work than the tub would need to be refinished.
Mr clean magic erase works wonders