Join Date: Sep 2005
Location: New Westminster, BC
Thanked 587 Times in 558 Posts
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Cast iron keels are out there, no question, and they do need some extra care.
I agree with SF that if the epoxy sealing has been done correctly it should last a long while as long as you don't break through it - don't hit the bottom!!
If it's never been done, then blasting and fairing followed by a good seal coat will pay dividends for a long time to come. Our boat has an iron keel that has been sealed and so far it's been fine. We have had previous boats that needed sealing and they required cleanup each haulout. After doing a proper sealcoat job, that was the end of the rust for as long as we kept the boat.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)