No, salt does not damage the plaster. Improper water balance will.
yes it does
no
You drain the water then plaster the walls from inside
Yes.
yes. you can go swimming in a salt or swimming pool chlorine based. however, you must wet your hair and add sulfate free conditioner to it in order for the treatment to stay
Yes, plaster will dry out and crack.
No
Not at all.
No Plaster of Paris is too soft and too porous to be useful in any thing to do with a swimming pool.
Sorry, but swimming in a saltwater pool is a lot different than swimming in the ocean. In the ocean, pollutants like oil, gasoline, and trash combine with fish urine and dead animals. Another big difference in a pool is that there are no waves! In the ocean, rip tides and tidal waves are a big part of the ocean's cycle. In your pool, waves are non-existent.
sodium chloride
Yes. Suggest you inspect pool and drain closely for cracks or other damage.
Yes, you can add a clear saltwater system to a ProSeries 14' X 42" Metal Frame Swimming Pool.