ARP bolts are commonly used, but I have had many high mileage 22R's and have yet to see one break, except from a rod breaking from running out of oil and spinning the rod bearing on a project truck I had.
As far as the external bolts, you could take them to a machine shop and have them tumbled with steel pellets in solvent - IF they have a tumbler. They come out clean with a satin finish.
As far as the external bolts, you could take them to a machine shop and have them tumbled with steel pellets in solvent - IF they have a tumbler. They come out clean with a satin finish.