mjbgalt,
Oh I disagree strongly!! As I stated earlier: bead blasting is done to close the pores of the barrel surface. GRIT blasting which involves the use of sharp edged aluminum oxide [as in sandpaper] which does create an etched surface w/ thousands of open pits that is used as a pre cursor for painted surfaces........
As you can see, these are two similar operations, but with totally different purposes.
Jim