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I need fiberglass panel advice. Please Help before I goof it up!

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  • I need fiberglass panel advice. Please Help before I goof it up!

    I thought this would be a good day to tackle a fitting problem I'm having. My engine lid doesn't line up with the rest of my panels and I thought I would ask you guys before I do what I think is best and start cutting.

    Both corners are sticking up and need to be refitted. The right side is the worst. It's up over a half of an inch from where it is suppose to be. The left side is up about 5/16ths.
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  • #2
    Re: I need fiberglass panel advice. PLEASE HELP before I goof it up!

    I was thinking of cutting on the red line and reposition it. Then glass it back together again. I also have the inner structure to deal with as well. Am I taking the correct approach to this? I can't think of another way to get around this.

    This car is getting to be a nightmare.
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    • #3
      Re: I need fiberglass panel advice. PLEASE HELP before I goof it up!

      Are you not making a steel frame for it? that would hold it in place.
      Can you apply to under sideand move it?
      or just put weight on it for a day and see if it stays
      I had a part box on a trunk once and it warped the trunk permanently maybe do that in your favor?
      The only time i did it. I slotted thru your red line 50% from the under side and then moved it to the correct angle then strengthened

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      • #4
        Re: I need fiberglass panel advice. PLEASE HELP before I goof it up!

        Sean;

        I would see if you can adjust the piece through weighting down and possibly a heat gun to the piece before cutting.

        One of the disadvantages to cutting where you say is that the curve upward will not disappear and you will end up with a slight ridge where you cut that will need a bunch of feathering.

        I usually try to make some wood forms that give the correct shoe you want and then screw those to the outside of the part, heat up the inside surface and then once cooled, put a couple layers of glass on the inner surface to hold the proper shape. If you already have an inner part put on the outer part then cut the inner part on the tallest surfaces and do the same wood forms and glass the inner cut lines. That will also hold your outer shape.

        Throw a pic of the inner surface so we can see what it looks like. Cut the outer surface as a last result is my recommendation.

        Cheers
        Don
        308 Ferrari replica
        Prova Countach 5000S

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        • #5
          Re: I need fiberglass panel advice. PLEASE HELP before I goof it up!

          Here is a view of the inner structure. Do you think I should cut out a section like you suggested? It's very strong now. You can't push or twist the panel in the correct place at all. With the inner section removed it would probably give some. I have steel support near the window to give additional support for the window and hinges, and struts.

          I don't think putting weight on it would help in this case.
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          • #6
            Re: I need fiberglass panel advice. PLEASE HELP before I goof it up!

            I know it won't help you this time. But I always insist that my panels are NOT bonded together by the panel maker. You are illustrating a prime example why. Bonding together during the build is much easier in the long run. I know the type of resin and bonding adhesive John used to make those panels, I don't think you are going to be able to warp or heat and warp them that much. Or at least I think they will, over time, try to go back to their original shape. I think you will have to either cut the outer skin and rebond or cut a slice out of the back and pull it down. JMHO...

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            • #7
              Re: I need fiberglass panel advice. PLEASE HELP before I goof it up!

              I agree with Bartman. I have been able to reshape large panels by using a kerosene powered torpedo heater like a giant heat gun but separating the inner from the outer and re bonding in the correct position bay be your best bet.

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              • #8
                Re: I need fiberglass panel advice. PLEASE HELP before I goof it up!

                Awesome quality control!

                Good luck brother.

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                • #9
                  Re: I need fiberglass panel advice. PLEASE HELP before I goof it up!

                  Thats a tough one Mac, what I would do in your situation is get behind the panel and cut away a 2'' strip from the backing portion of the panel near the edge. I would then pre-drill and counter sink some holes for some self tapping screws. Lay a 2'' strip of bent steel down with the shape you need, Use some duraglass and screws to keep it in place. Glass and fill over the piece of steel so it blends into the rear structure of the panel. Done deal, easier said then done though
                  http://signatures.mylivesignature.co...D765AC7574.png

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                  • #10
                    Re: I need fiberglass panel advice. PLEASE HELP before I goof it up!

                    Hope that helps
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                    http://signatures.mylivesignature.co...D765AC7574.png

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                    • #11
                      Re: I need fiberglass panel advice. PLEASE HELP before I goof it up!

                      try seperating inner and outer panels on the outer and top bonding ridge and leave the edge by the glass still bonded together. Now setup a jig by having sort of bar stiking up from the inside so that when you close the deck lid it will hit it from the inside just arount the corner close to the glass. Find a heavy weight and put it on opposite corner where its sticking up. the weight will push it down in the effect that you have indicated by the red line. Once you figure out how much weight you will need, put it aside and put some bonding compound of your choice back in those seperated 2 sections. lay the deck lid back on the rod and put the weight back on top of the lid. Ocne it cures it will stay inthe new position. If you like you can drop it by 1/8 inch just in case it likes to defleck back a bit
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                      • #12
                        Re: I need fiberglass panel advice. PLEASE HELP before I goof it up!

                        Mac,
                        I would not cut the top surface. Once you do that you are going to be in for a lot of finish work to get it looking smooth again. I would put a cut along the inner surface (see attached picture). This cut will give the top surface some flexibility to it. You may have to play around with the width of the slot in order to get the top to bend enough to fit where you want it to. Once you know you can get it to bend where you want it, open the cover and throw in some bonding agent (kitty hair, epoxy etc) between the cut lines, close the hood and secure it at the height you want using weighs, tape or what ever you can to keep it in place until it dries. Once dried, grind down a section and add in some layers of fiberglass to strengthen it. I have had to do this a few times already and it has worked for me. The good news is... if you dont get it right the first time, you can re-cut the line and try again...

                        Good luck!
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                        • #13
                          Re: I need fiberglass panel advice. PLEASE HELP before I goof it up!

                          All great advice.

                          Thanks guys... I'm glad you all talked me out of cutting the outer skin. That would of made much more work. What I ended up doing was to cut out a section of the inner skin. I didn't attempt to separate the original bonding locations. The section I removed should bond back fairly easily.
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                          • #14
                            Re: I need fiberglass panel advice. PLEASE HELP before I goof it up!

                            I put a brace from the top side with some square tubing and little blocks of wood. I then used a heat gun and heated the whole area until you could of fried bacon on it. I'm now in process of adding additional fiberglass from the inside to hold the shape like Don suggested. So far, it is working out great.
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                            http://www.madmechanics.com/forum/bu...y-project.html
                            http://www.madmechanics.com/forum/bu...-facelift.html
                            http://www.madmechanics.com/forum/bu...430-build.html

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                            • #15
                              Re: I need fiberglass panel advice. PLEASE HELP before I goof it up!

                              Originally posted by Ferrari Berlinetta
                              Mac,
                              I would not cut the top surface. Once you do that you are going to be in for a lot of finish work to get it looking smooth again. I would put a cut along the inner surface (see attached picture). This cut will give the top surface some flexibility to it. You may have to play around with the width of the slot in order to get the top to bend enough to fit where you want it to. Once you know you can get it to bend where you want it, open the cover and throw in some bonding agent (kitty hair, epoxy etc) between the cut lines, close the hood and secure it at the height you want using weighs, tape or what ever you can to keep it in place until it dries. Once dried, grind down a section and add in some layers of fiberglass to strengthen it. I have had to do this a few times already and it has worked for me. The good news is... if you dont get it right the first time, you can re-cut the line and try again...

                              Good luck!
                              Ferrari Berlinetta, I didn't read this post until after I cut out the inner section. Your suggestion could of possibility worked as well in this case. Although the warpness is over the entire area. By removing the panel all together the entire section was able to flex into the correct location.
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                              http://www.madmechanics.com/forum/bu...y-project.html
                              http://www.madmechanics.com/forum/bu...-facelift.html
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