Most of these old footpegs are worn anyhow. PC'n every seperate pice is the way to do it properly and sometimes it helps take up slack in the holes etc.
Just blasting it and coating it will end up with sandblast media stuck in places and PC'd over.
Taking them apart is more work, but looks better and how often does you peg pop up anyhow??.
When I blast them, I do the inside/outside and bend them in different ways to get all the rust out of the nooks and crannies; Then I PC them.......
In my 20 day build, I did the pins in read and the rest in super mirror black. They still look great.
All our government does is distract us while they steal from us, misspend our tax $ and ruin our country