Will cleaning latex cause shiny patches?

Yes. This applies to all brands of latex, except silk-gloss or washable latex. These shiny patches can appear from touching or rubbing against the wall, and are especially noticeable with dark colours such as black, blue and brown.

We have a detailed explanation from one of our suppliers about the sensitivity to burnishing and streaking. It also explains exactly what scrub classes are. We of course use scrub class 1 (which is different from washable latex).

If you want to be sure this won't happen in your home, the best option is to have your entire property painted in semi-gloss or washable latex. This does cost roughly double the price of regular latex. Operating rooms and waiting rooms in hospitals are also finished with it. Most people choose to have only the kitchen done in washable latex.