Join Date: Jun 2004
Location: West Michigan
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On three of my most recent boats the stanchion bases had a groove running from the center to the lowest edge that lets water drain. For installation I lightly waxed a straw (used johnsons paste wax, and a straw from a can of PB-blaster) and laid it in the groove before fastening the base down, after the sealant cured I pulled the straw out so it keeps the drain hole clear.
Mine are cast bronze and have the groove cast in, if yours are pressed stainless there -may- be enough thickness to file a groove in them for drainage.
When I rebedded them there was just a very light amount of dust under them so I don't believe clogging would be an issue.