Fiberglass over cardboard?

  1. #1

    Member Since
    Jul 2007
    Posts
    2

    Fiberglass over cardboard?

    Hi guys! Total newbie here with a question. I've made my helmet gauntlets, and jet pack out of cardboard and papermache. Huge thanks to every one here who posted templates and ideas and suggestions!

    Now I want to strentghen them a bit to save em from dents and paint cracks from flexing and stuff. A friend suggested a coat of fiberglass resin painted over them with out the matting or cloth. Would this work, or am I inviteing disaster with a gooey mess, or a very rough surface with weeks of additional sanding?

    Has any one done this before, or is there something else out thier other than fibreglass that will do the same thing?

    Cheers people!

    shade0074au

  2. #2

    Member Since
    Mar 2008
    From
    Limerick, Ireland
    Posts
    261

    Re: Fiberglass over cardboard?

    Hi shade0074au - welcome to TDH!

    Im sure some of our more seasoned builders here will chime in with better advice than me but...

    Ive been using Skips templates and Fiberglass Resining without the glass matt on the outside... two coats adds a nice stiffness to the helmets in my limited experience OH - and as far as mine goes - it just adds strength and a shiny surface - no sanding unless you follow it with bondo or the like

    Talking about it here if it helps - http://www.thedentedhelmet.com/showthread.php?t=26682

    HTH

    Dave

  3. #3

    Member Since
    Jul 2007
    Posts
    2

    Re: Fiberglass over cardboard?

    Thanks mckenic! I appreciate your advice. I don't want to rush into this build without fully reserching it. The last build I did turned out to be a collosal mess, I was my first time using fiber glass. I'd used fiberglass on the inside and outside, overlapping the matt. The end result was heavy yellow fett looking paperweight! Lessons learned I guess.

    Love the Boush Helmet your working on. I'll look great once it is finished. The WIP photos are a great guide, It looks like the FG resin alone should be tough enough to do the trick.

    Thanks heaps dude.

  4. #4

    Member Since
    Mar 2008
    From
    Limerick, Ireland
    Posts
    261

    Re: Fiberglass over cardboard?

    Any time! Im learning myself so Im just glad I was some help!

    Dont forget to post pics of your build!!!

  5. #5
    Dark Jedi's Avatar
    Member Since
    Feb 2004
    From
    Huntsville
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    811

    Re: Fiberglass over cardboard?

    Here are my two cents:

    Fiberglass will work on carboard. The carborad makes a really nice base and you can build up on it to get a really strong piece. this is sort of how many people build their Halo armor on the 405 site. The make the armor out of carstock first and then glass it.

    A few warnings though

    1.) RESIN IS TOXIC!!!! be sure you are in a well ventilated area and use the appropriate reperatory protection

    2.) Resin does not stick to packaging or duct tape!!! if any of the surfaces have this, remove it and replace with masking tape

    3.) have a palm sander. Sanding fiberglass to a smooth finish is a real pain.

  6. #6
    t_bone9600's Avatar
    Member Since
    Dec 2005
    From
    Jackson, Ohio
    Posts
    855

    Re: Fiberglass over cardboard?

    Like mckenic I am using one of Skips templates as well. 'Cept I'm working on the RG helmet seen here . I started with a couple coats of FG resin on the outside and that worked out great on the face and top portions. The back, however, still had a little bit of flex to it. I assume it is due to where it is a large flatter area. So, I just added some FG cloth the to gain more strength.

    Also... Wear proper attire when using the resin. It does not play nicely with body hair of any kind.

  7. #7
    hadez2's Avatar
    Member Since
    Nov 2008
    From
    OHIO!
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    7

    Re: Fiberglass over cardboard?

    thank you god for other noobs like me!

    so i was wondering would this fiber glass resin method work with a carved hardwood like balsa or butternut? does the resin seep into the cardboard making it harder and if so how much weight does it add? are there any other ways to strengthen up cardboard armor? and lastly whats the best way to attach the armor and hard parts to cloth?

    sorry if i posted in the wrong area but this just seemed right. thx for any help your wiling to offer

  8. #8
    mechadick's Avatar
    Member Since
    Oct 2008
    From
    Montréal, Canada
    Posts
    7

    Re: Fiberglass over cardboard?

    Thanks for those info. I am also working on a project and wanna use FG over cardboard.

  9. #9
    returner's Avatar
    Member Since
    Oct 2008
    From
    Timperley, The U of K
    Posts
    2

    Re: Fiberglass over cardboard?

    I made this head out of paper mache about 20 years ago and then covered it with fiberglass about 15 years ago to make it stronger and more like the original. It worked out fine just make sure you are in a well ventilated area as mentioned before.


  10. #10
    FettSniper's Avatar
    Member Since
    Jul 2007
    From
    Sarlacc pit a.k.a Diss Norfolk UK
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    347

    Re: Fiberglass over cardboard?

    hadez2 said: View Post
    whats the best way to attach the armor and hard parts to cloth?
    There are various ways of doing this but for me i have basically used clothing snaps or poppers, the snaps come in two parts glue one side to the armour and the other needs to be punched and attached to the cloth part of your costume. they work very well and means you can easily remove the armour.

  11. #11
    hadez2's Avatar
    Member Since
    Nov 2008
    From
    OHIO!
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    Re: Fiberglass over cardboard?

    sounds like good way to go! thanks for the info!

  12. #12

    Member Since
    Dec 2008
    From
    Bellingham, Wa.
    Posts
    12

    Re: Fiberglass over cardboard?

    The guys at 405th fiberglass the inside of their cardstock paper models, to do this they recommend putting 1-2 coats of resin on the inside and the outside of the model then adding resin and fiberglass to the inside of the model for structure (let each layer dry and harden between coats). If you plan to fiberglass the outside you risk losing detail on the model.

    My personal experience with this is that if you have a cardstock model with cardboard backing or just a cardboard model you can have a few problems:

    The main problem is if you glass the inside (cardboard side) and only resin the outside, the card board becomes a 'soft' center between 2 harder areas. Any stress to the outside (resin only) can cause the cardboard to give and will crack the resin on the outside.

    If you only want to add a fiberglass layer to the outside you will improve the durability of the model and you shouldnt have the problem listed above. You could lose detail, but that can be added back with a dremel tool or other device in most cases.
    -Aaron

  13. #13
    rubenbender's Avatar
    Member Since
    Dec 2008
    From
    Curitiba, Brazil
    Posts
    16

    Re: Fiberglass over cardboard?

    But before u put the resin, is better u put a poliaclrilic sealant on the cardboard, thts makes the cardborad water-resistant and more rigid

  14. #14
    LOPIE's Avatar
    Member Since
    Jan 2009
    From
    Ocala, Florida
    Posts
    21

    Re: Fiberglass over cardboard?

    That thing looks like my mother-in-law. Please keep her.

  15. #15

    Member Since
    Dec 2008
    Posts
    15

    Re: Fiberglass over cardboard?

    Ok so I have a question.
    I am pretty sure most of you use a different kind of cardboard. I am using corrugated cardboard and I am wondering id the Fb resin and Fb sheets will work well with this kind.
    A friend of mine said the FB would eat through the cardboard, will it really do that?
    Oh and if you guys knwo the answer that will help me out SO much.

  16. #16
    depbauer's Avatar
    Member Since
    Oct 2008
    From
    Stl, MO
    Posts
    13

    Re: Fiberglass over cardboard?

    Thanks for posting this one it helps.

  17. #17
    C1RCA's Avatar
    Member Since
    Oct 2008
    From
    Humboldt, Saskatchewan, Canada
    Posts
    700

    Re: Fiberglass over cardboard?

    AQUA Resin is not just an fyi
    Dark Jedi said: View Post
    Here are my two cents:

    Fiberglass will work on carboard. The carborad makes a really nice base and you can build up on it to get a really strong piece. this is sort of how many people build their Halo armor on the 405 site. The make the armor out of carstock first and then glass it.

    A few warnings though

    1.) RESIN IS TOXIC!!!! be sure you are in a well ventilated area and use the appropriate reperatory protection

    2.) Resin does not stick to packaging or duct tape!!! if any of the surfaces have this, remove it and replace with masking tape

    3.) have a palm sander. Sanding fiberglass to a smooth finish is a real pain.

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