Re: Prepping to re-bed stanchions.
Follow the instructions provided in the link to Compass Marine (Mainsail here on SN). It's an extra couple of steps, but fairly minimal time, and you will never have to worry about a wet core in those areas again. Also, order the butyl rubber for re-bedding from Mainsail, his is infinitely better than the Home Depot stuff.
SV Laurie Anne
1988 Brewer 40 Pilothouse