Sorry to keep you waiting. Busy as crazy doing another bathroom in the house. Hopefully the last for a while. Yes it is paint behind the vanity. After much deliberation I went ahead and painted it. It is easily wiped down for any accidental splash back but unless your bathing in your washbasin there’s hardly ever any The floor tiles, and in fact all the tiles are from Moorabbin Tiles. Polished porcelain. Thank you for your kind feedback

I'd replace and go with the diagonal pattern also, despite the cost (you've got to look at it for a long time yet presumably). I think the existing look comes undone because the tiles on the bench laid as they are appear to add yet another design element to the area and actually make a feature of the bench itself. I personally wouldn't want to make a statement piece of the bench itself. If the tiles were laid diagonally, I think the bench would flow seamlessly from the wall into the floor. Similarly, if you highlighted the edge of the bench with the "decorative strip" tile, I think the bench again becomes the feature piece. Lovely roomy shower enclosure though, nice job.

With most old houses walls and floors are not straight and perfect, however wall tiles can go some way concealing this. I don't know if a reputable tradesperson will fix glass panels to old tiles and be happy to guarantee the job. Seems like an ideal opportunity for mould growth between the old tiles and the new glass if any shower water gets an opportunity to seep around the edges or joints of the glass. I think you may be surprised just how much this type of glass costs to install, and you would probably be better off doing the job properly with new tiles and a proper waterproof membrane as required by the building regulations (which your old shower recess doesn't have). In the future your potential new buyers will probably appreciate a freshly renovated bathroom that conforms with the current building regulations (with standard tiling) rather than a glass panel over mould in a bathromm that doesn't comply with the regulations. Best of luck, Dr Retro of Dr Retro House Calls

Some baths are more suited for shower baths than others. It depends on the flattish standing room at the bottom of the bath. Some baths are quite curvy and narrow. Make sure you stand in a showroom bath to see if it feels too narrow (without your shoes). You will need a four flange bath for tiling and waterproofing in your shower bath scenario. https://specify.caroma.com.au/products/baths/vivas/vivas-1675-anti-slip-bath Best of luck with your planning, Dr Retro of Dr Retro House Calls/Dr Retro Virtual Visits