Plastering is a commonly used construction technique that traditionally relies on the use of conventional sand, which is becoming scarcer and hence has become environmentally unsustainable. This study aims to assess the technical feasibility and performance of marine sand, a residue of off-shore dredging operations, in plastering applications. The particle size distribution of the marine sand demonstrated its unsuitability in concreting applications due to the presence of finer materials in large quantities. The plastering mixture was evaluated for its mechanical, rheological, durability and hygroscopic properties. A comparative analysis between marine sand plaster and contemporary crushed stone sand plaster was also carried out. Workable plasters with optimal rebound losses and adequate open porosity, water absorption, water tightness and reasonable indoor comfort were categorised based on the available standards. The results indicated that plaster compositions incorporating marine sand, with cement-to-sand ratios of 1:3 and 1:4, demonstrated suitability for external plastering tasks. Additionally, a ratio of 1:5 was identified to be suitable for internal plastering applications, aligning with all the applicable codal provisions.