Had an interesting experience trying to get brick dust out of my hair.
I spent a couple of hours working with a combination of a hammer and chisel, and an angle grinder, to try and cut my protruding broken blocks flush with the rest of them. First I used the angle grinder to cut away the most obvious protrusions as best I could, then used it to cut channels into the concrete so I could cut between then (effectively creating a kind of zig-zag pattern in the profile), then used it more as a grinder to remove the remainder. Then the grinder shut down because the thermal protection circuit triggered, so I let it cool, put the battery on the charger, and continued with a hammer and chisel. When my arms got tired I ran the shop vac to clean up as much of the fine dust as I could manage, then checked the angle grinder and it was ready to go again. So I had another round of cutting and grinding, then the angle grinder shut down again so I went back to the hammer and chisel, and another round of cleaning up the dust. It was truly remarkable to see just how much dust the process generated - thankfully I was working right beside a window so I opened the window and used a box fan to pump air out of the room. I shudder to think how much more dust would have been in the room, had I not pumped it outside.
Eventually I got to a point where the brickwork looked more or less flush. If I'd thought ahead of time I'd have taken a piece of the insulation panel into the room beforehand so I could have checked to make sure I'd cut enough away, but by the time I thought of that I was covered in so much dust I didn't want to walk through the house to find a piece. For some reason my wife doesn't like it when I leave a trail of dusty footprints all through the house.
Because I was so dusty - I could bang my sweatpants and see a cloud of dust escape from them - as soon as I was outside the door to the room I was working on took my working clothes off and bundled them up ready for going in the laundry. I didn't really want to even step outside of the room but, since I've taken the blinds down, I decided to make that small humanitarian gesture.
Then came the challenge of getting the dust out of my hair. It took quite a lot of goes running shampoo through my hair to get rid of it all - initially I think the water more or less just ran straight off. I don't think I've ever been quite so dusty in my life, and don't particularly want to be that dusty again any time soon. I'm really hoping I've cut enough off the blocks so I don't need to go through all that again - it's amazing how far the dust spreads.
I had hoped to be able to hold a shop vac nozzle in the same hand as the angle grinder and get a lot of the dust before it had chance to spray everywhere but it meant stretching my hand enough I didn't feel confident it was a safe arrangement.