Bead blast only the areas of the parts that are visible, and keep the abrasive stream away from the single action cocking notch of the hammer and the double action area of the trigger.
Bead blasting is often mis-named "sand blasting". The difference is, the blast media is very uniform in size and abrasive qualities in bead blasting. Some is made of tiny glass beads, some is an abrasive grit-like material.
Depending on the media and the air pressure you can get a rougher or more frosted appearance.
Another option is to put a fine grade of wet or dry sand cloth on a flat surface like a piece of thick plate glass and push the parts over the sand cloth to remove the jeweling.
Still another option is to just let whoever is going to do the plating prep the parts to remove the jeweling. If you send the parts to a real professional plater like APW/Cogan, Ford's or one of the other top companies, they can do this easily.