I purchased a condo in SW Fla last year and have spent countless hours updating it. I still have several projects in mind and I'm so glad to have found this website to help me - I'm pretty much a DIY novice. I visited a neighbor yesterday who showed me her shower where she had painted the tiles. She said she did this about a year ago, the shower is used every day, and it looks GREAT! She said she went over the existing tiles with "mirac acid"? - then an oil-based primer and oil-based paint. I'm thinking about trying it & would greatly appreciate any suggestions or advice. Thanks!