Husband used boric acid on the tile shower walls
The walls of the shower have no shine there are white makes from where he sprayed it. The tiles are black and look like poop and driving me crazy what can I do to fix his boo boo
It sounds like the walls of your shower are a calcium based tile, like marble or limestone.
They may need to be refinished, which is no easy task. You need to find a stone professional in your area to come out and assess the damage.
Restoring shower walls can be expensive and if you are not careful of what products are used to clean them, this could happen again.
I wish I could be more help, but you need a stone professional in your areas to come see the walls to accurately give you a quote.