I have watched all the vids on prepping your ceramic tile for painting. Everyone says to wash your tile with
acetone or lacquer thinner first to remove the “oil film” off the tile. I got thinking about that and remembered my mother baked ceramics for 40 years. When that tile comes out of the kiln at 1800 degrees f., there is nothing left on the tile oil wise. So I called Materials Marketing in San Antonio, Tx. (210-731-8453). I was informed that I was correct and there is no oil film on the tile. Materials Marking told me to just wipe the tile with windex and go for the show. Yes, I still use lacquer thinner to wash clean my messed up tiles and that’s the only time I use it. So please, stop wasting time and money cleaning tiles that don’t it.
Hope this helps!! R. Cline