Illustrator Sharpen edges after using effect

[rvdh1979]

Hi all,

I have a question, I applied a grain effect in Illustrator (CS5) to get a metal brushed look, and now my strokes/edges aren't smooth anymore. How can I smoothen my edges again? See picture below, the black is before the effect, the grey after the effect.

Many thanks in advance!

 

[hawkeye]

Put a mask over it just slightly smaller than the original object.