This is exactly the problem. Occasionally, I get a customer request for one of my bolt knobs (aluminum) to be bead blasted as the final finish. It is literally dirty the minute you touch it with clean hands. Having the action bead blasted and then sprayed with clear Cerakote may be an option. Or just shoot it and enjoy it.I have a Panda action that has been glass beaded and it's near impossible to keep it clean. I just allowed it to "age". The rough surface will catch about every kind of stain and hold onto it. You may need a toothbrush and abrasive to clean the your action.