Electric discharge coating (EDC) has gained significant importance in recent years due to its unique ability to enhance the surface properties of various materials. In this field, the dielectric fluid plays a crucial role as it significantly impacts the quality, efficiency and outcome of the coating. In this work, the influence of three types of dielectric medium on output responses was investigated. The coating operation was carried out on Al-7075 alloy with Cu-MWCNT PM green compact electrode. The primary objective of this study is to compare the effects of hydrocarbon oil, kerosene oil and urea solution on responses such as material deposition rate (MDR) and surface roughness (Ra). Peak current (Ip) and pulse on-time (Ton) were used as the coating variables. Further investigation is carried out using an optical microscope to analyse the surface characteristics of the coatings. The deposition rate was found to be highest with hydrocarbon oil and lowest with urea solution. At similar Ip settings the kerosene oil exhibited Ra of 3.36 µm, whereas the urea solution displayed Ra of 1.37 µm.