Removing Tile from Plaster Walls
I have 1960s-1970s tile in my 1925 bungalow bathroom. It's not awful, but I'd like to tile around the bathtub and add a shower so I want to replace the existing tile throughout the bathroom with vintage-style subway tiles. The original subway base tiles are still there, so I know tile has been removed from the plaster walls at some point in the house's history.
How can I remove the tile without damaging the plaster? Also, can I just tile over the plaster for the shower area, or should I do something else to waterproof it?
Thanks in advance!