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 Glueing Plastic to paint

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Tug--Kenny
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PostSubject: Glueing Plastic to paint   Fri Mar 16, 2012 4:56 pm

I have been working with Plastic styrene for years but now have a query.

I usually join it by running the liquid plasticWeld glue down the join and this works fine by literally welding the two pieces together. However, I find myself forced to join a clean piece to a painted piece.

I cannot scrape the painted piece for fear of fracturing the 'Paint job' and spoiling the look. I am aware that it does melt into the paint but I wondered if there was any method to go down to the original plastic base ? There is also the chance of spilling the liquid onto the wrong part of the paint job and spoiling the look.

I find, that when dry, it's possible to snap of the join, taking the painted edge with it. If I use superglue then it's the same effect. The joins do hold in position but are not really very strong when it comes to bumps.

I have to stick plastic letters along the side of a painted hull where they may get knocked off. Here is a picture of someone else's boat to show what I'm after.

cheers

ken

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nhp651
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PostSubject: Re: Glueing Plastic to paint   Fri Mar 16, 2012 9:32 pm

a tricky one that Ken.......

I am a great advocate of using double sided sticky tape for such jobs.....if you look at my build blog of the ambulance launch you'll see the stuff I use........it is waterresistant once stuck and is micro thin...also you could put it onto sections of each letter to stick them onto the hull.........that's the only suggestion I can say as I normally letter mine with stick on vynil lettering from Bess.

neil.
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Damien
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PostSubject: Re: Glueing Plastic to paint   Fri Mar 16, 2012 11:07 pm

5 min epoxy will work in this situation as well Ken spread sparingly on the letters.

Damien.
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Tug--Kenny
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PostSubject: Re: Glueing Plastic to paint   Sat Mar 17, 2012 10:34 am

Thanks for the thoughts. I was thinking of a small scrape down to plastic, within the letters boundary, so Epoxy might be the answer.

I'll post the results later.

Ken
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tt1
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PostSubject: Re: Glueing Plastic to paint   Tue Mar 20, 2012 12:31 am

Hello Ken, Have often found the need to do the same, not only new styrene to paint but paint to paint as well. I always scrape back to styrene within the profile of the parts and generally use cyano. It's surprising just how little an area you need to scrape to get a sound bond. Have tried other methods without much success and got into a right mess at times.

Regards, Tony.
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Tug--Kenny
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PostSubject: Re: Glueing Plastic to paint   Tue Mar 20, 2012 10:55 am

Hi Tony

Yes, that's the way I shall go. The letters to be stuck on are quite wide enough to allow for scraping the hull.

Cheers

ken
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