Unless there is some serious damage to a BB shell, the judiciously careful application of a stiff wire brush will normally suffice, certainly to a steel one. If not, you need good quality stuff and considerable care not to bugger it up.
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Unless there is some serious damage to a BB shell, the judiciously careful application of a stiff wire brush will normally suffice, certainly to a steel one. If not, you need good quality stuff and considerable care not to bugger it up.