Can I apply microcement on a lime-cement plaster?

Lime-cement plaster is suitable if it is solid, matured and dust-free. Old coatings, weak spots or sandy surfaces need to be removed or consolidated. It is not only about the substrate material but mainly its condition. Before application, check for strength, flatness, grease, dust, cracks and any movement. If the surface is risky, it is better to reinforce it or first create a test area. Proper priming is essential.