I am installing this shower kit and realized that I should not have primed and painted the mildew resistant drywall, but that ship has sailed.
https://www.lowes.com/pd/DreamLine-Infinity-Z-White-3-Piece-36-in-x-60-in-x-79-in-Base-Wall-Door-Rectangular-Alcove-Shower-Kit-Left-Drain/5014370029...