I don't know how to finish [sand] raw urethane foam to a smooth un-even surface. It will always have slight valleys and irregularities in it.
I forgot to mention I used peel-ply over the "deck cloth" and 5.4 oz fiberglass cloth [one lay-up] after I filled and sanded [finished] the filled-foam structure smooth. Again the intent was to have a finished piece of work before lay-up so the lay-up is final ready for prime. This method was suggested by the aeropoxy rep. some years ago and it makes since to me. I was sure to clean the filler with solvent [lacquer thinner] to remove dust and give the epoxy resin a porous surface to soak into. [note: all low spots were filled and sanded to a straight edge gauge.] Note: don't use polyester filler under epoxy laminates, it will not adhere as well in my opinion. Epoxy chemically bonds better to epoxy. I my case it's a done deal. KRron ----- Original Message ----- From: "larry flesner" <fles...@midwest.net> To: "KRnet" <kr...@mylist.net> Sent: Tuesday, April 27, 2004 7:56 AM Subject: Re: KR> fillers > > >I guess you are right for your method. My goal was to not have any > >finishing for the final glass and it happened that way. I don't want to risk > >sanding through to cloth. > >KRron > +++++++++++++++++++++++++++++++++++++++++++++++++++ > > Ron, > > Are you talking "finishing" or "fill" here. The way to eliminate "fill" is > to get the foam right to start with. I used the 1.4 oz deck cloth over > my "KR cloth" and even it required some amount of "finishing" before > priming, generally some light sanding. Your post would suggest that > when your epoxy/fiber layup cured you were ready for primer/paint. > > I personally would not suggest "hard-shelling" as the method to cure > irregularities in the foam. The best way to eliminate irregularities in > the foam is with a new piece of foam. > > Larry Flesner > > > > > > _______________________________________ > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html > >
