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11 Sep 2008 - 11:485977
Working with polystyrene
I'm trying to make hammer with a polystyrene head and wooden handle of some sort. I have 2 cylindrical blocks that I want to stick to together. What kind of adhesive should I use? Also how should I paint it?


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11 Sep 2008 - 11:545978
Absolutely no solvents! Or you will see your hammer dissolve before your eyes

Acrylic paint is fine, but the surface doesn't always let paint sit evenly, so it might be worth coating it in papermache, PVA or Gesso before the actual paint.


11 Sep 2008 - 11:595979
get in contact with mangachild (as to me) hes like the master of sing that stuff lol and he should be able to give you some good tips and trades


11 Sep 2008 - 12:345980
With polystyrene i have used duct tape, double sided tape, silicone sealant, PVA and no more nails.

Evo stick may work but try a tester patch brefore hand as some it may corrode the polystyrene...

Or you can papier mache the surfaces to be glued and use any glue on top.


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11 Sep 2008 - 14:075984
Thanks.

Do you think that I should run the handle through a groove in the centre or cut a small in the bottom to put it into?

Also, would a melane primmer work OK? I think we have some around the place.


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Last edited by Ice-climber (11 Sep 2008 - 14:14)
11 Sep 2008 - 15:485987
I'd make a hole in the polystyrene head to slide the handle into.

Use PVA to stick it together and then paint the whole thing in PVA to seal and prime it. this will help cover any indents or imperfections and provide a good surface to paint on.

For the best finish you could paint it with Latex too.

Then use acrylic paint.


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12 Sep 2008 - 11:106009
Quote Ilpala:
I'd make a hole in the polystyrene head to slide the handle into.

Use PVA to stick it together and then paint the whole thing in PVA to seal and prime it. this will help cover any indents or imperfections and provide a good surface to paint on.

For the best finish you could paint it with Latex too.

Then use acrylic paint.


Sorry to ask what is probably a stupid question but is that same stuff from craft shops/used in school or something else?


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12 Sep 2008 - 14:516016
PVA is indeed that white stuff you use in school. You can buy it almost anywhere!


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23 Sep 2008 - 05:116372
Quote Amy-Lou:
Acrylic paint is fine, but the surface doesn't always let paint sit evenly, so it might be worth coating it in papermache, PVA or Gesso before the actual paint.


Yes you have to coat it in PVA to stop the paint eating into it and to make a smooth surface, but it's NOT okay to use acrylic paint without coating it first. I've seen lots of cosplays ruined because of that little mistake...


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Last edited by Orihime (23 Sep 2008 - 05:15)
23 Sep 2008 - 08:416374
Quote Orihime:
Yes you have to coat it in PVA to stop the paint eating into it and to make a smooth surface, but it's NOT okay to use acrylic paint without coating it first. I've seen lots of cosplays ruined because of that little mistake...


Standard acrylic has never eaten polystyrene for me, but the polystyrene has waterproof properties that make the water-based paint streak badly and the texture shows through. It takes way too many layers to look good, so coating it saves time


23 Sep 2008 - 15:336377
Painting it with acrilics won't eat at the styrene but don't do what I did and tried to spray paint the poly ball. It shrivelled up :\

Also don't use hot glue on to the surface. It'll shrivel up too.


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23 Sep 2008 - 15:356378
That's strange, 2 of my friends tried using acrylic and both times it ate away at the polystyrene. Perhaps they had used spray acrylic and it was the aerosol which ate away at it, not the paint itelf, hmm... But I agree, when I trid it coating it did make the paint sit better and get rid of that nasty bobbly texture ^^;


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Last edited by Orihime (23 Sep 2008 - 15:37)
23 Sep 2008 - 19:166381
It should be fine. I'm using PVA to prime it anyway.


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