Donie75 wrote: » Do you still have the old perspex windows? If you have you can restore them back to very good condition with a bit of T Cut. Use plenty of T Cut and elbow grease and they'll come up like new. Good job on the restoration.
dnme wrote: » I have some of the old windows, but one of the front ones is missing, and the other one is a badly botched homemade job. Also the windscreen is beyond recovery. The flat side windows are fine, I can make new ones very easily, but the two profiled front ones and the windshield might be tricky. WRT the windshield, not only do I need to form perspex, but I also need to make (or have made) an aluminuim surround. Jesus I don't know where to start. So the windows are a bit of an issue, and I aint giving no dam fabricator 400 quid for three windows on a boat that cost me 500 quid in the first place. (sometimes I really hate the ripoff republic)
fergal.b wrote: » Here is a link on thermoforming that might be of help, you can use a heat gun to blow heat into the box and control the heat if it has a temp setting.http://www.theplasticshop.co.uk/plastic_technical_data_sheets/working_with_perspex_manual.pdf
Gingersnaps wrote: » I'm just wondering would a heat gun, (you know those paint stripper ones) be enough to form/shape the perspex over the window mold??? I've no experience in anything like that but I just thought it might work. Keep up the great work.
fergal.b wrote: » Use the resin mixed with the 405 filler you can get a finish as good as the gelcoat or you can get a gelcoat repair kit from MPD http://www.marineparts.ie/paint-and-maintenance/epoxy-repair-kits/plastic-padding-gelcoat-filler.html Isopon is not as waterproof as epoxy and can break down after a while.
dnme wrote: » I'm not using West System, bought my epoxy here. Are gelcoat repair kits polyester based? if so they wont chemically bond with epoxy? no?
fergal.b wrote: » They are made to bond with the fiberglass where it's exposed use a sander to clean it out and taper the edge it should be fine.
dnme wrote: » Most boats are manufactured with polyester resin including mine. You can epoxy onto polyester and achieve a chemical bond, but if you polyester onto epoxy, you only get a mechanical bond. In my case, I am repairing holes in polyester with epoxy. But then I need a filler to finish the epoxy. Am I being too particular?
dnme wrote: » The whole epoxy / polyester thing is killing me. It seems now that Epoxy is not really compatible with csm. CSM is coated for polyester. So Epoxy only takes woven cloth or bi-axial cloth. Also, gelcoat / repair is polyester based as are most finish fillers, also polyester is a dam sight cheaper. I'm thinking of returning the epoxy order and going down the polyester route. Good god, for a beginner this is confusing stuff.
fergal.b wrote: » Once you sand the polyester the epoxy will stick to it no problem