MEK Peroxide (methyl ethel keytone) is the water-soluble plastic film that you spray over a gel-coat repair, to keep off the oxygen, which retards the curing process.
I better way on an older boat is to use a two-part polyurethane. Rather than LP (linear polyurethane), an automotive type is better because you can sand out any runs, and it stands up to UV better. You can spray it over gel-coat (prep just like you would when using gel-coat, then wetsand out the edges and buff. It'll be the shiniest spot on the boat, esp[ecially ten years later. The best auto-type polyurethane is Deltron, made by PPG. You can't get it many places now in CA because of harrassment from the air quality people, but it IS still legal for boats and airplanes. Jerry jerrymontgomery.org ----- Original Message ----- From: "Bob Olson" <[EMAIL PROTECTED]> To: "For and about Montgomery Sailboats" <[email protected]> Sent: Sunday, April 17, 2005 10:01 AM Subject: Re: M_Boats: Gel Coat Matching > Bill, From what I've been able to glean from various websites regarding > gelcoat, is that its primarily a production process material. In other > words, it works best when sprayed into a mold as the first layer in the > production process before the layers of fiberglass. I have a feeling > that it would be difficult to replicate the original gelcoat look by > applying it over a hull repair. And, I'm guessing that it would need to > be covered in order to cure properly. Typically, a boat shop would spray > a water soluable material over the gelcoat as a final step. After the > gelcoat had cured, then the top layer would be washed off. > > That's why I'm leaning toward a linear polyurathane (sp?) product. More > expensive than cocaine, but it sounds as though it's the right product > for post production repairs. > > How the hell do you de-core part of a rope for a centerboard pendant? > That's the thing that got me boggled right now. > > --Bob > > [EMAIL PROTECTED] wrote: > > >In a message dated 4/17/2005 12:08:11 AM Pacific Standard Time, > >[EMAIL PROTECTED] writes: > >West System believes that you can put gelcoat over their epoxy. > >Bob, > >I was about to go buy another book when I had the right one all along (West > >System Boat Repair & Maintenance). The book is inexpensive, around $3.00. On > >page 8 it refers to the steps needed to use gelcoat over epoxy. Looks like my > >little projects will be fine with the use of epoxy only. No need to use > >polyester resin for the small hole repairs I've got in mind. However, they do > >recommend a long epoxy cure time of two weeks prior to putting on the gelcoat finish. > >Bill > >"Tipperary" > >_______________________________________________ > >http://mailman.xmission.com/cgi-bin/mailman/listinfo/montgomery_boats > > > > > > > > > > > > _______________________________________________ > http://mailman.xmission.com/cgi-bin/mailman/listinfo/montgomery_boats > _______________________________________________ http://mailman.xmission.com/cgi-bin/mailman/listinfo/montgomery_boats
