You have to be careful trying to change a mirror polish to a satin without damaging the chrome. The quality of the chrome and the the thickness can play a part. That being said, Pete, our resident finish expert, said you could take the MPFB multi-purpose finishing block and work it over the surface and it will mildly change the finish. Personally I have tried that and I didn’t see it do that much. Better way to do it by hand is to take one of those pads you use in the kitchen, a scotch brite pad, and it will leave some brush strokes. The problem with using the fine scotch bad belt on multi tool grinder is that it runs too fast and actually can remove metal faster than you may recognize it. Would take a light touch and still you might go too far very quickly. You can take the fine belt and use it by hand. It will scratch it up and again, you just have to be patient and use a light touch. Polished stainless heads its not as big an issue since they are not chrome plated. Just know that any belt used on a multi tool grinder at speed will remove some metal.
I have to agree with Britt regarding restoring a satin finish. I have used the scotch brite pads with some success. Best to use a foam sanding block wrapped with the scotch brite for uniform finish. Use several scotch pads to polish as they will deteriorate. Polishing belts and sandblasting will not yield
a finish to match the satin finished club head. I have had good success using this method ( it will take some time)