Medical
Parts that have to be cleanable: stainless steel, a surface without scale, and transitions where nothing gets left behind.
Cleanability is a design property, not a finishing step. Fully welded seams, radiused transitions and an even surface decide whether a part can be got clean. Glass bead blasting removes weld discolouration and evens out the surface; what else is needed depends on your requirements, which we record up front.