Bead blasting and shot peening are different.
Bead blasting tends to remove material and/or roughen the surface. Shot peening uses larger shot (non-abrasive) that just bangs into the surface without removing material. It is a bulk process that replicates hitting the surface with a hammer - all over.
I have the MKS pedals on my most recent build. They are a nice pedal, probably a worthy heir to the Lyotard (probably better). I like the wide cages.