I looked at the POR website and I'll give it a try. Thanks for the info.
Quinton
"Jere Lull" wrote in message
...
In article ,
"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



Tanzers also have cast iron keels or keel/centerboards and share info
like this on our list, http://groups.yahoo.com/group/tanzer/

Generally, we've all stripped the coal tar formulations and gone to
POR-15. The nice thing is that you don't have to get to bright metal,
just get rid of the loose flakes.

The other popular option is to barrier-coat after blasting. We did that
a dozen seasons ago and were jealous of the results reported by the POR
crowd. Had been touching up the rust spots with RustLok for a while, but
replaced most of that with POR in the past few seasons. POR has been
lasting much better in the perennial problem spots. No failure where I
did the work properly.

If I wanted to do it right, I'd chip, POR (two or 3 coats), fill, fair,
then barrier coat. That should last a decade or so (except where you
bounce).

--
Jere Lull
Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD)
Xan's Pages: http://members.dca.net/jerelull/X-Main.html
Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/