Rustoleum Tub & Tile Refinishing Kit is the route I went. Comes in White, Biscuit or Almond. Bought it online. About $30. You repair all your cracks and chips first and let therm dry, then this kit is just an enamel paint that you brush or roll on over the entire tub or shower. It's like having an entire new shower interior for me, covered up all the old staining and chips in the floor from when I dropped a can of shave cream or my razor, etc.
Thank you!! That's fantastic - that's way better than the white-ish silly putty it looks like now. I'm all over it!