Did you happen to look here:
Useful modification and maintenance guides - Clean, repair, tune, fix yoyos
I believe there are two articles:
How To Polish Aluminum
How To Strip and Polish a Metal YoYo
Did you happen to look here:
Useful modification and maintenance guides - Clean, repair, tune, fix yoyos
I believe there are two articles:
How To Polish Aluminum
How To Strip and Polish a Metal YoYo