3D Printing is predominatly designed to produce Prototype parts, offering a rapid method of assessing the overall look, shape and size of a part, filament material properties and their reaction to temperature and the extrusion process, often mean that parts will not be 100% dimensionally accurate, it is also often difficult to exactly recreate surface textures on a 3D printer due to the texture imparted by the printer.

Depending on the finish you require simply removing the print from the bed and removing any support structure is often all that's needed to get your model ready. Printed parts often have a ridged / grainy or textured finish and depending on the finish required, and the intended use of the printed parts, you may wish to treat / remove surface imperfections, and even paint your part in these circumstances there are a number of post-print processes that can be used to enhance further your model - The simplest approach to a smooth surface finish on your models is to simply lightly sand and polish the model, wooden parts for example can be sanded and varnished, and some plastics respond well to Acetone Vapour, processes like this are well documented on the internet - however always be sure to use correct PPE and follow any usage instructions when using any chemicals.