dont you guys use lapis brushes?
Fair enough, you're probably right about it getting into the pore spaces. Maybe the fact the bristles can deform more easily and are in denser clumps means it's like those toothbrush advert claims were they say "this toothbrush reaches bits others can't"...
On your teeth or the rock?
Ah, following the Adam Lincoln Training Plan I see...
So let's put it down to a brain fart on your part for the time being.
Bonjoy:Hmmm, it's a different force acting on it. Usually holds with lots of foot-traffic become polished (unless the outer layer is removed such as Hanging Arete at Higgar) because pressure is exerted downwards and the pressure is spread out over a wider area whereas brushing exerts downwards force and force backwards and forwards with brushing and is localised in a small area. Look at New Jerusalem for example, nobody stands on that hold and yet it's become massive through overbrushing.
How does superglue look/feel once applied? Is it invisible?