pace steerer
Hiya,
saw your steerer thread; give it a clean with some coarse Scotchbrite or similar;better if you can spin it slowly lathe-like. check for any deep pitting, particularly around the section just above the crown. If it is really rusty then replace it[I have new ones in stock at £28 posted] but if it is just surface rust treat it with Waxoyl or thick grease.
Hope that helps
tim