I used a sharp chisel to shave the plexus off the gelcoat. The old glue was still flexible enough that sanding didn't work well at all. It was a long process as there was a lot of glueline to be cleaned. Quite a lot of gelcoat came away with the plexi, which I filled and sanded flat. My plexi was slightly oversized and it was a problem because of the bevelled inset. I had to bevel the back of the plexi to open a channel for the Dow 795.
Al SV Elendil 94 C&C 37/40+ On Mon, Apr 24, 2017 at 2:42 PM, Gary Russell via CnC-List < [email protected]> wrote: > Hi Mark, > If you are going to use a smoke colored acrylic, you don't need to > disguise the gelcoat damage with paint or anything else. The darker > acrylic will hide the damage completely. I just faired the damaged gelcoat > with and epoxy based fairing compound and sanded it flat. I applied the > VHB tape over the faired gelcoat. and it adhered fine. I am into my second > season with the new windows and they look terrific with no leaks. If you > have the old windows off, you have the worst part behind you. > > Gary > S/V Kaylarah > '90 C&C 37+ > East Greenwich, RI, USA > > ~~~~~~~_/)~~~~~~ > > > On Mon, Apr 24, 2017 at 4:26 PM, Dr. Mark Bodnar via CnC-List < > [email protected]> wrote: > >> >> Got my sheet of plexiglass for my window replacement. >> >> This weekend I started by removing 2 of the old surface mounted windows >> to use a templates. I used a small paint scraper/putty knife and a hammer >> to split the bond between the plexi and the boat. It wasn't painless - but >> worked fairly well with I think minimal damage (I seem to recall a >> suggestion from this list not to "pry" the window off but chisel all the >> way around to minimize the gel coat damage). >> >> Now I'm wondering if there are any specific recommendations to clean up >> the area before putting on the new windows? >> >> I'll need to scrape or sand off the remaining plexus and surface coat >> over the damaged areas. Don't think it needs to look pretty because it >> will all be covered with the new dark plexi - plus I'll spray black on the >> back of the plexi where it's going to be against the hull. I'll try a >> scraper and random orbital sander to get the plexus down - as long as I've >> got a solid surface for the VHB tape to adhere. For the damaged gel coat - >> skim with some thickened epoxy and then some gel coat or just paint? Or >> does it need any covering given it will be protected from UV by the >> plexiglass? >> >> My plan is to cut the new windows about 1/2" larger all around to cover >> any damage or discolouration. >> >> Any advice on how to get the remnant plexus off or best repair method is >> appreciated. >> >> Mark >> CS 30 - Prosecco >> >> -- >> >> >> >> There is no cure for birth and death save to enjoy the interval. >> - George Santayana >> >> >> _______________________________________________ >> >> This list is supported by the generous donations of our members. If you >> wish to make a contribution to offset our costs, please go to: >> https://www.paypal.me/stumurray >> >> All Contributions are greatly appreciated! >> > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > wish to make a contribution to offset our costs, please go to: > https://www.paypal.me/stumurray > > All Contributions are greatly appreciated! > >
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