Hello all: I am working on a series of metal, welded sculptures that I would like to gently sandblast or clean to bare metal without texturing the metal. Mostly mild steel, hot rolled, cold rolled, etc. These include bars, pieces of sheet, pipe cutoffs, tubes and bar stock. Some have mill scale some do not. I usually finish it to bare metal, remove cut lines, grind off any imperfections. My point is that they are not super smooth even in their final form. In the past, I have typically finished the surface to almost final form and then done my welding and assembly. Then, all is required is some touch up to the final form. I put a lot of work into this pre-finishing and discovered it can greatly impede my creativity. Sometimes I abandon a part that I spent a great deal of time working on. More often, I feel compelled to use it because of the effort it took to prep it. I'd like to either speed up the pre-finish by softly sandblasting (without the tiny pits) the pieces before assembly and/or hit them with something after assembly. I've heard of walnut shells, or plastic sandblast media. Does anyone have experience with these? TIA
-Mike St. Louis, MO