Can I apply microcement on sand-blasted epoxy?

Sand-blasted epoxy usually provides a very good mechanical substrate. However, the sand must be firmly embedded; loose grains need to be vacuumed or removed, otherwise they will cause issues in the next layer. It is therefore not just about the material of the substrate, but primarily about 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.