A few nice Aluminium Windows images I found:
Aluminium dusting powder.
Image by Izzard
Here the SOCO is using aluminum powder with a soft brush, since the window ledge, glass and table are all shiny surfaces. There were some trainer marks on the table but they were unfortunately easily dusted away in the process.
The SOCO said that he could taste the aluminum as the dust goes everywhere and was floating around in the breeze from the window. I asked if it was bad to breath a lot of it in, as he must do in that job.
"It’s been linked to Alzheimer’s," he said.
"You already told me that," I replied. I kill myself sometimes. 