Thanks David, I have antifouling paint so that is good. I do have a kick up rudder, and I have noted some minor surface discoloration on the SST that is submerged. I found a rudder sacrificial anode on Defender marine, was going to try to mount that somehow. Will also try prayer. http://www.defender.com/product.jsp?path=-1|299255|319698&id=3320019 Tyler From: Dave Scobie <scoobscobie@gmail.com> To: For and about Montgomery Sailboats <montgomery_boats@mailman.xmission.com>; Tyler Heerwagen <theerwagen@yahoo.com> Sent: Thursday, July 13, 2017 4:47 PM Subject: Re: M_Boats: Zincs needed for my M17?? For the hull and centerboard a sealing coat under the antifoul. The rudder needs to be out the water if the mahogany variety ... Unless coated with fiberglass and epoxy under the antifoul. The kickup ruddercraft types need to be out of the water (ie, kicked up). The lower gudgeon is a problem as stainless should not be under water full time (depends.on how your boat is configured if lower gudgeon will be in the water). Besides the above not much else you can do but prayer. ;-) My M17 spent over 20 years on a mooring on Puget Sound with no problems. (The cast iron centerboard was serviced at 20 years.) :: Dave Scobie On Jul 13, 2017 5:28 PM, "Tyler Heerwagen via montgomery_boats" <montgomery_boats@mailman.xmission.com> wrote: I have the boat in the water for the summer. Wondering about corrosion to rudder fitting, anything associated with the Keel or centerboard, and anything else that does not occur to me. It's in salt water, I do keep the OB tilted out of the water.What do you recommend? Any specific products or methods?Thanks,Tyler H.SeranitaM17 #232