For all this is worth here is what I did with my KR to prepare the foam/wood for glass cloth. It's is not a the popular method. 1. Shaped the urethane foam [ and adhered pieces with urethane adhesive] with sand paper as best I could. Foam is hard to get to a finish smooth surface. 2. I applied aeropoxy filler and sanded it to a smooth surface filling all the surface, Then I sanded and refilled and sanded to a ready to paint condition. 3. Applied the bottom layers of fiberglass cloth with the last layer the fine model airplane fiberglass. This eliminated almost 100% of pin holes. 4. Applied final coat of aeropoxy filler [very thin coat] 5. Use a heat gun [hair dryer] to help spread the filler in cooler environments. The above process helps prevent sand throughs because the filling-finishing is the first thing you do. The epoxy/glass cloth adheres very well to the filler.
KRron ----- Original Message ----- From: "Brian Kraut" <brian.kr...@engalt.com> To: <larry.ca...@comcast.net>; "KRnet" <kr...@mylist.net> Sent: Monday, April 26, 2004 7:15 PM Subject: RE: KR> fillers > Funny that you brought up that point. I was just pondering what I was going > to use as a filler yesterday and was thinking about the same thing. If you > put on the glass, then sand without sanding all the way down to the glass > fibers you are left with a bunch of little dimples between the fibers that > need to be filled. These little dimples will be unsanded shiney epoxy so > what keeps the filler sticking to them? > > Brian Kraut > Engineering Alternatives, Inc. > www.engalt.com > > -----Original Message----- > From: krnet-boun...@mylist.net [mailto:krnet-boun...@mylist.net]On > Behalf Of Larry A Capps > Sent: Monday, April 26, 2004 2:36 PM > To: 'Stephen Jacobs'; 'KRnet' > Subject: KR> delaminations! > > > Hard-Shelling can be problematic as far as (secondary bond) adhesion is > concerned. If we look microscopically at the top of the hard-shelled part, > we will see peaks and valleys. These valleys would not be easily sanded > without great effort and the possibility exists of sanding into the foam > part in many areas. > > > _______________________________________ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > >
