The rustofix works with wirebrushes, but is also has rollers, so you can adjust, and maintain even pressure easily (I haven't used one myself, but that's what I understood it does) ; and it has dustcollection.
The machine is expensive, but if you are a "floorguy" for example it could be worth the investment. Makita has a similar tool, the makita looks more like a planer, as where the festool looks like an anglegrinder with a hood attached.
link to the makitapicture of the rustofixI saw the sandblasting done to some huge old beams a few years ago, at a remodeling job of an old farmhouse. After it was done we had to place the biggest one sloped up inside the house, behind open stairs, the threads were let into the brickwalls on both sides, so it only looked like the beam was supporting the stairs. (pity I didn't take any pictures, it looked pretty cool when it was done)
