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  1. #1
    Join Date
    Oct 2004
    Posts
    84

    Polyester Resin Layup question

    Howdy, from the lovely orange sunset this evening in hills of Colorado,

    I have a fiberglass body ('27 roadster) for my street rod that I have cut in half to widen and cut across to lengthen.

    I use standard E-glass cloth and polyester resins for mods which cures leaving that wax on the surface of the layup.

    Yes, I am aware of the resin that does not have the wax and an additive to seal the last layer. I think that's what we used for composite fuel tanks.

    However, being on a budget (cheap), I use the barnyard polyester resin which does have the wax. I usually sand it off before proceeding to the next op.

    So, is there a way of prepping the surface, that is removing the wax without sanding to get rid of the wax to get ready for the next op? I have some very tight areas to prep for more glass work and right now, a delicate set up to maintain alignment between all the pieces of the body.

    Now that I give it more thought (there's a concept) I realize the sanding of the wax layer adds more contact surface for additional glass work.

    Thank you for your consideration.

  2. #2
    Join Date
    Mar 2003
    Posts
    35538
    Wash with soap & water. But you should still sand for better adhesion.

    Sent from my VM670 using Xparent Pink Tapatalk 2
    Gerry

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    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

  3. #3
    Join Date
    Jan 2006
    Posts
    156
    You have to get rid of the wax or you get fisheyes when painting. I used to wash area with aceton several times after sanding.

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