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Old 06-23-2012, 06:47 AM   #1 (permalink)
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Pinholes in gel coat

Hey guys, I am sanding the body with 100 grit, as per the Suggestion Manual. One thing I've noticed is many little tiny holes in the gel coat. Not deep or anything, but I'm wondering if the primer would fill these little holes or should I use filler/putty on them first?
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Old 06-23-2012, 08:21 AM   #2 (permalink)
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Primer will not fill them is my experience. Take a very stiff bristle wire brush and tap the areas where the pinholes are. This will expose more of the air bubbles in the gel coat and allow you to fill em in now instead of when its in primer. The outer lip around the tail of my black body Coupe was awful. I completely reshaped it with filler it was so bad.
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Old 06-23-2012, 12:36 PM   #3 (permalink)
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like TN says, wire brush treatment and filler. I had a few pockets that were quite dense, but easy to fill. I still have no fingerprints............

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Old 06-23-2012, 12:42 PM   #4 (permalink)
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Quote:
Originally Posted by JohnPR View Post
Hey guys, I am sanding the body with 100 grit, as per the Suggestion Manual.
JohnPR:

...euh stupid question maybe, but I could use some suggestions for the body... What is the 'Suggestion Manual' you are refering to???
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Old 06-24-2012, 01:22 AM   #5 (permalink)
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Quote:
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JohnPR:

...euh stupid question maybe, but I could use some suggestions for the body... What is the 'Suggestion Manual' you are refering to???
It's just a nickname for the Build Manual; it's so bad that some of us started calling it the Suggestion Manual.
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Old 06-24-2012, 10:02 AM   #6 (permalink)
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Old 06-24-2012, 01:36 PM   #7 (permalink)
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Yea, great manual if want to know how to mount the inside rear view mirror, or how to install the screen mesh for the hood side gill opening But practically useless for actually building a car. Thank God for thoses that worked it through and share their experiences here.
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Old 06-24-2012, 03:32 PM   #8 (permalink)
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Sherwin Williams automotive does have a excellent high build/filler epoxy primer that will fill small holes. I used it when repairing fiberglass on some 68 Shelby parts, worked very well to fill pinholes. Just spray on a couple of coats, let harden and sand down. If the pinholes are larger that that (I found one about 1/3 in in size when working on the door fitment of my coupe) than you will need to use a good bondo such as Rage to fill these larger holes before using the epoxy primer.
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Old 07-04-2012, 09:22 PM   #9 (permalink)
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Need to get a good Glazing putty to do the joints this will also take care of those pin holes, I used U-Pol Liquid Gold Glazing Putty.
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Old 07-04-2012, 09:58 PM   #10 (permalink)
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Wormie you doing body work already!?!
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Old 07-05-2012, 11:56 PM   #11 (permalink)
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Euh, not quite but I hope soon. Got to get done with the stupid EGR pipe then I can drop the engine in. I'm into the harnesses, not sure how much dieting i'll do, at least not until I get the engine started. Did a neat trunk expansion, but my battery box is a bit rough...

...and how are you doing?

Last edited by wormie; 07-06-2012 at 02:08 AM..
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Old 07-06-2012, 09:37 AM   #12 (permalink)
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threw another $3000 at the engine this week maybe this month but not looking good

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