Following the cleaning and application process is key to getting a fantastic result. I've highlighted some important points below, but a full description can be found in the technical data sheet and on the packaging.
Clean all surfaces thoroughly with a multi-purpose cleaner. Bleach is not recommended. Clean all grout lines with a stiff brush.
There is a packet of cleaner included in this kit. Dampen the included scrub pad and sprinkle the cleaner over it. Scrub the entire shower stall to remove mould, dirt and soap scum. Thoroughly rinse down the area, ensuring all residue is gone. Repeat the cleaning until the tiles feel clean and have a smooth surface.
Remove all silicone caulking inside the stall as the product will not adhere to it. This can be replaced after the painting is completed. Ensure you pay particular attention to any areas where the silicone could be smeared onto the tiles.
Inspect the grout between the tiles for any cracks, chips or holes. Repair grout first by re-grouting severely damaged areas.
Once cleaned, repaired and dried, remove any moveable fixtures. You can then tape off any adjacent walls with painter's tape.
Please let me know if you have any questions, and I can't wait to see your results.