Comparing electrochemical pre-treated 3D printed native and mechanically polished electrode surfaces for analytical sensing

•Study compares two 3D printing approaches and different electrode surfaces.•Electrochemical pre-treatment is required to enhance 3D printing electrodes.•Mechanical polishing enhanced 3D pen made electrodes.•For analytical sensing 3D printer and pen made electrodes have niche applications.•Study shows how 3D printed electrodes should be made to enhance analytical sensing.