here's a vid of the bristle brush in action........
https://m.youtube.com/watch?v=ufVo93qLEqQ. .we use them to clean rusty metal ...better than a wire brush cause your not slinging wires everwhere....I thought I had some in the shop but I'm out of em
the roloc system is great...it lets you swap styles of discs with a simple twist...you'd have to get the spindle and proper size backer....
here's a piece of rusty painted metal that I hit quickly the the sand disc and the scotchbrite style
this is what I use mostly at home....I use lots of the sanding discs and finish up with the scotchbrite style.....you can get all diff grits....