as long as you use the old blunt/broken pick and not a good one cause it'll end up about as sharp as a butter knife after scrubbing a couple pitches
for real heavy duty scrubbing, you want an ice axe cause the adze works great to peel off moss carpets
for cleaning a pitch it helps to have an ice tool, narrow wirebrush, whisk, nuttool and toothbrush
start with axe
whisk
go over it with wirebrush
whisk
use nut tool on thin parts and deep cracks
whisk
final touch up with toothbrush
one last whisk and it's g2g