Hello, I've done some research on this. I know that prep work is the key. I am willing to make sure the prep work is done correctly, and am willing to wait longer for things to dry, cure etc. if I need to. I do have some questions and some general thoughts. I welcome your feedback and experiences to share. I know the tiles must be extra clean and then sanded before any priming can begin. Most things I have seen say use 220 grit sandpaper. Wouldn't I want to start with something a little coarser? Like 100? The idea is to scuff the tile so the paint adheres better. Wouldn't a coarser grit be better at scuffing them? As far as a final coat; what if (after a week or so afterwards), I apply an oil-based polyurethane or sealer? Wouldn't that help protect the tile and make it more durable longer lasting? No articles or tutorials mention this. To me it makes sense. Is there a reason NOT to do it? Would I want to use an oil base paint, or an exterior latex paint for durability? I'm trying to think outside the box so I can achieve lasting results. Thanks for your help!