Firstly sorry to be a grump but don't turn everysingle topic into a huge debate about brake pads!!!! there are about 10 per week anyway!
ok so everyone wants this mystery grind... hmm ive had trouble trying to think how us.. the general trials public with limeted access to machine shops and specialised tools can replicate this finish sooooooo..
idea 1
wheel ( minus tyre 'n' tube ) in frame clamped onto work surface so that cranks can turn and wheel can spin when pedel'd k...
obtain/aquire a knurling tool from hss or college for a laith, one that opens wide enough for your rim
mount this tool some how at 45° to the rim so that the rim passes between the two wheels ( 45° because then you have a multi directional brake surface, go eat cheese onza! )
get a mate to turn the cranks very fast firstly to ensure that the whole assebly doesnt shake and to make sure that the tool is in the right place
now with your mate going hell for leather on the cranks, GENTLY, start to turn the tightening knob on the knurling tool, slowly the desired effect will appear on your rim, dont forget very slow movements and this should work, as long as you persistyou should be fine
please feel free to critisise and/or refine this process at will, its just an idea and i will not be offended and not feel the need to unrelentlessly brick your mothers :huh:
im going to try this and i hope that this helps someone one day cos thats what lifes about, contributing!!!
Mark.