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Curing problem?

Discussion in 'Fiberglass & Plastics' started by richie, May 29, 2017.

  1. richie

    richie New Member

    So far this forum has been a wealth of information. My first post is a question. I want to know if the attached photos represent an example of improperly cured fiberglass? The fenders are aftermarket f1 Ford truck replacements. They have been painted 10 or 11 years. There was considerable work done to fit them. None of that is showing. Just a weird wavy texture. Much much worse than say orange peel. I haven't seen the truck in years and now its in for a mechanical issue but I could not help but notice. Curious to know so I don't have this thing happen again.
  2. Barry

    Barry Paint Fanatic Staff Member

    Could very well be, this is why we set new fiberglass pieces outside in sun for 5-7 days before sanding or doing anything,.
    I have seen perfect gaps change inside of a month because the shop did not UV cure the panel.

    The other thing that can cause this is overloading the basecoat,
  3. shine

    shine Member

    many times primers and paints are applied too heavy . i have been guilty of it myself and seen the same results. not enough flash time . car will look great for a few years then the urethane wave shows up. sets inside a lot and takes a while for the sun to work it. i push flash times to the limit now. imho solvents are not your friend .
  4. richie

    richie New Member

    Thank you for the replies. I should add this is only on the fiberglass fenders. To be honest, I don't recall the procedure I used as far as curing. I do remember them being outside, but can't remember for how long. If I were to redo them, would I need to sand down to primer or glass? Layers PPG dp 90, sw color prime, dp 90 as sealer, dbu base, concept clear.
  5. shine

    shine Member

    block and reclear .

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