Help with forming shapes out of 'glass

Discussion in 'Boat Yard Basics' started by TomFL, Feb 19, 2009.

  1. TomFL

    TomFL Well-Known Member

    I have a few ideas in my head that I want to make for the duck boat project. Need to make some smaller boxes and shapes out of 'glass.

    What material can I use to make the mold shape out of that will release once I wrap it with 'glass?

  2. Brett

    Brett > PRO STAFF <

  3. flyfshrmn82

    flyfshrmn82 Well-Known Member

    Find a cardboard box that is the size you want, or make a cardboard box to size.  Make sure the cardboard is pretty stiff.  Tape up any seams the box has.  Then apply a good coat of wax (special releasing wax [20.00]) and spray it with a couple coats of PVA (another release agent [30.00]) that is how I made numerous brackets for my boat, and is essentially how my livewell was formed.  

    Livewell pump bracket was made from a box that the pump came in....  
  4. Brett

    Brett > PRO STAFF <

    Nice mold work Jes, I've never tried cardboard as a mold base.
    Have made console and deck molds out of plywood, Formica
    and plastilina. Mold release wax on the Formica and Partall
    everywhere to ensure separation.
  5. TomFL

    TomFL Well-Known Member

    Aweseome info guys, thanks

  6. 1BadPFS

    1BadPFS Built not bought...

    I like to use super thin balsa sheets from the local hobby shop. Build the part, then cover it with a layer or layers of glass. with epoxy and the right cloth weave you can make a part look like it came out of a mold.