Larry&Sallie Flesner wrote:
>>Ok i have replaced a couple foam blocks in one of the wings and have put on1 >>layer of glass!!!do i wait for it to dry before i put on a second layer >>on!!! and also when i put on the peelply do i put epoxy on the top of it >>and squeegy it off like the glass!!! seems like the peelply would be hard to >>get off!!! i really dont under stand that part of it!!! thanx Randy >> >> >++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > > From you post I'm assuming you're using epoxy resin. If so, it really >doesn't matter that much. I'm sure your first layer is cured by now >so remove any peel ply, if applied, and lay up the next or final layers >and then cover with peel ply if you want. The peel ply is simply laid >on top of the wet glass and "dry brushed" until it takes on a wet >appearance. That is the peel ply soaking up the resin from the >glass and will help to give a finish that requires much less fill and >sanding. When the epoxy is cured you simply grasp the peel ply >at one edge and peel it off. Wait for the epoxy to totally cure before >removing the peel ply or you will mess up the glass. For multiple >layers of glass the general procedure is to apply all layers of glass >in a single application, one layer at a time of course, making sure >that each layer is totally wetted out before the next layer is applied. > >With epoxy I don't see a need to do a lot of sanding between layers. >Just sand down any bumps, prickly edges, and the like. I've never >had a problem with the new lay up sticking to the cured layer of >glass. The surface is rough enough for the new epoxy / glass >layer to adhere and you only finish the top layer anyway. No need >to sand each layer smooth. If you do any sanding, don't sand >though any layer of glass. It only weakens the lay up. Do try to >make each layer as flat as possible to eliminate any humps >and bumps that will require fill and sand to finish. In cases >where I would add another layer of glass to an already cured >layer that I had to sand a bit, my preferred method to clean the >glass was just a real good vacuum to remove dust and not apply >any chemical cleaners. Use your best judgement. > >If you are using Vinyl ester resin, the whole thing changes and >I really can't advise as I've never used it. The Vinyl ester cures >with a "wax" finish that must be removed before adding additional >layers. If that's the case, other will have to advise on the best >procedure. Good luck. > >Larry Flesner > > > What's the current technology for epoxy we use ? My 7.5 gal supply is too old. What would be similar to the the hexcell from 14 years back ? -dave
