In metal fabrication, surface finish means how smooth or rough something feels to the touch. There isn’t a good or bad finish, and the proper finish should be determined by how the part will be used. Rough finishes look great painted and smooth finishes look great as bare metal. The surface finish results from the manufacturing process used or it can be created with a secondary process like bead blasting, grinding, or polishing. Sand casting creates rough finishes, die cast parts are much smoother because they are made with smooth molds. Machined parts are much smoother than any cast part. Machined parts are suitable for use as bearings, in optical assemblies, and for the molds that are used to make tiny plastic toys you can step on at night. Next time you have to specify a surface finish, give Sexton a call and we will help you explore your options.