fwiw,,,
i take a nylon wire tie, cut the end off at an angle and it makes a very nice non marring tool for digging the crud out of that very spot,,,
and bronze brushes may very well damage the finish on some of these airlites, so be careful
side note,,,recently a kid brought some mercury to school around here somewhere and spilled it on the floor, results?
school evacuated, epa, dep, hazmat, they were all there, kids brought to the hospital for observation,,, on and on it went
and we used to hold it in the palm of our hands and poke at it with our fingers and watch it blob around. where'd we get it? out of the science lab in school...