Aerosol Spray Refinish bath, tub, shower pan, fiberglass, acrylic and porcelain
Favored for their solid coloring and nonporous nature, acrylic shower pans are constructed of molded acrylic plastic sheets. Like all shower pan finishes, an acrylic shower pan.
Large tile, yes. Not sure about shower pan in place of tiled shower floor though.
DIY Bathroom Renovation: How to Build a Custom Tiled Shower Pan Bathroom Custom Shower Pan with Gray Floor Tile
Prefabricated shower bases, or shower pans, save time and diminish the difficulty associated with installing shower floors. Shower pans have sloped floors which will guide all water toward the drain .
How to build a custom-sized, waterproof shower pan for a curved shower enclosure. Detailed instructions and pictures.