Oxidation is the enemy here. Once you sand down to bare (bright) metal, oxidation begins immediately.
Another trick similar to Wally's suggestion is to sand to bright metal then immediately apply epoxy or resin with a ScotchBrite pad saturated with resin or epoxy. The idea is to rub the oxidation off with the rough pad while SIMULTANEOUSLY applying the resin so the metal is not exposed to the air. Once you have protected the metal from contact with air, you're good to go with your fairing. For minor fairing you can use AwlFair or 3M Premium Filler. For deeper spots start with 3M High Strength Filler then smooth with the lighter fillers. Dennis C. Touche' 35-1 #83 Mandeville, LA On Thu, May 1, 2014 at 7:05 PM, John Irvin via CnC-List < cnc-list@cnc-list.com> wrote: > Zinc chromate applied to sanded metal helps the next layer to adhere. > ------------------------------ > From: Wally Bryant via CnC-List <cnc-list@cnc-list.com> > Sent: 2014-05-01 2:39 PM > To: cnc-list@cnc-list.com > Subject: Re: Stus-List Keel Fairing > > I'm assuming it's a lead keel. > > I did spot repairs on my lead keel in 2003, and it was a good idea but > didn't take. > <http://www.wbryant.com/StellaBoat/hauls/0307/haul.htm> Perhaps I messed > up. > > A few years later I stripped the whole thing down and reworked it from > bare lead, and that has been perfect ever since. > <http://www.wbryant.com/StellaBoat/hauls/0604/index.htm> > > Now, I can honestly say that the best way to deal with exposed lead is > to sand it down clean and immediately sand resin into the lead. Then > prime and paint. > > Wal > > you wrote: > > While scraping and sanding the hull of our 30mk1 I knocked out a couple > of > > (fairly?) large chunks of fairing on the keel. I can see metal. > > > > Can anyone advise me on the proper repair procedure please? Should I > grind > > it all off or patch? What should I use? > > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > >
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