Good advice, I suspect.

I gather your keel is gray cast iron, probably subject to
corrosion from stagnant seawater under the keel and in the
C/B well.

The keel has probably survived a good many years so it might
be useful to explore what has changed. You haven't said
whether this is an ongoing problem or something that
happened out of the blue after 45 years.

Chuck

wrote:
On Tue, 22 Feb 2005 12:17:36 -0600, "Sail-n-Dive"
wrote:


I'm doing a bottom job on my boat that has a cast iron keel with a
centerboard slot. Most of the keel stayed rust free but the slot and the
bottom of the keel that often comes in contact with the bottom at low tide
are rusty. I'm going to chip and sand blast but I'm unsure of how to treat
the bare metal before applying the new bottom paint. Suggestions?
Quinton


Suggestion #1 - don't allow an iron keel to come in contact with the
bottom

Suggestion #2 - Several layers of epoxy covered by a hard bottom paint


Weebles Wobble
(but they don't fall down)