Can I paint on old latex paints?

Which paints adhere to old glossy latex paints or to old wallpaper painted with latex paints?

These wall paints can be used to paint these surfaces without a primer:

Farrow & Ball
- Farrow & Ball Estate Emulsion
- Farrow & Ball Modern Emulsion

Little Greene
- Little Greene Absolute Matt Emulsion
- Little Greene Intellligent Matt Emulsion

- Sanderson Active Emulsion

- Zoffany Elite Emulsion

Paint & Paper Library
- Paint & Paper Library Pure Flat Emulsion
- Paint & Paper Library Architects Matt

Morris & Co.
- Morris Chalky Matt Emulsion

Designers Guild
- Designers Guild Perfect Matt Emulsion

With the mineral silicate paints from Le Corbusier, we would advise against painting directly onto latex paints.

If you want to retain a slightly glossy look like a latex paint, we recommend Farrow & Ball Modern Emulsion.
This has the same gloss level as a semi-gloss latex paint.