Trying to mold my doors...:((((

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Trying to mold my doors...:((((

Author	Message
The Fibreglass King	The Fibreglass King posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 69, Visits: 652	One other thing if you are not using a Rapid Tooling System and are building the mould traditionally you have to apply a couple of layers at a time let them completely cure then ad further layers this will prevent high exotherme temperatures which may cause, print through and distortion to your mould, Kind Regards The Fibreglass King
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TomDesign	TomDesign posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 454, Visits: 2.5K	man work more simple not try to invent bike. polyster resin and 450 frp for mold for first layer tissue 25gr. Good kuck
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The Fibreglass King	The Fibreglass King posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 69, Visits: 652	@ tomdesign, I totally agree keep it simple! 😉 . Kind Regards . The Fibreglass King,
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BlackNDecker	BlackNDecker posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 92, Visits: 251	So I have a really good feeling about this.... The working conditions were 13* celsius and medium humidity. I had to end up mixing 3 batches of gelcoat. The first batch was mixed at 2% and started to kick just as I finished that batch. The second batch was also mixed at 2% and started to kick waaaay too early (had to toss half that batch). The third batch was mixed at 1.5%. Altogether it took about 2.5 kg of gelcoat (including the ~500 g I had to toss due to rapid catalysis). It's difficult to brush gelcoat on a vertical surface but overall I'm happy with how it turned out. I'm not sure if I'm gonna lay a second coat of gelcoat. If I do, it will have to be rolled on because I don't have enough to brush on another coat... Edited 11 Years Ago by BlackNDecker
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BlackNDecker	BlackNDecker posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 92, Visits: 251	After waiting a little over 4 hours, I laid down a quick second coat with a roller on the large flat areas....comprising about 700 g of gel coat catalyzed at roughly 1.8%. The surface of the preceding coat was tacky (left finger prints) but did not leave residue on my finger. I must be doing something wrong because it still took a little over 3 kg to cover the door. I can't seem to get it to brush out as smooth as the video shows. FWIW, I am using identical brushes. Edited 11 Years Ago by BlackNDecker
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brainfart	brainfart posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 198, Visits: 1.4K	It's too cold in your garage. That's why you apply such a thick coat, the viscosity is higher. That's why you need more time to apply the gelcoat, and that's why it then starts to kick off too early. Let's hope you didn't apply the second coat too early and too thick and it will develop orange peel again. Here is a video of a similar resin, optimold (I strongly assume it is the same as unimould). Look how fast he's working, no fooling around. https://www.youtube.com/watch?v=0GzquRynX-g https://www.youtube.com/watch?v=6mvlrFogA_8
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Hanaldo	Hanaldo posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	Yeh this is what I hate about ester based gelcoats and resins. The application is always so stressful, the first few times I used it I felt like I was defusing a bomb. I used to always have it kick on me too, wasting heaps and occasionally causing a lot of voids in my laminate. These days I've gotten better at using it and its ok, though I still would never mix a 1kg or 2kg mass in one hit. Biggest I will do is 350-450g or so (a cup). Apply that quickly, then mix the next batch. Move strategically to cover the area I'm doing. Makes it a bit easier. Hope I has turned out a bit better for you this time mate.
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BlackNDecker	BlackNDecker posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 92, Visits: 251	brainfart (17/05/2014) It's too cold in your garage. That's why you apply such a thick coat, the viscosity is higher. That's why you need more time to apply the gelcoat, and that's why it then starts to kick off too early. Let's hope you didn't apply the second coat too early and too thick and it will develop orange peel again. Here is a video of a similar resin, optimold (I strongly assume it is the same as unimould). Look how fast he's working, no fooling around. https://www.youtube.com/watch?v=0GzquRynX-g https://www.youtube.com/watch?v=6mvlrFogA_8 The gelcoat was stored in the house and mixed in the house. I really don't think the temperature of the gelcoat itself had anything to do with the application thickness. Is there a way I can tell if the gelcoat orange peeled before I apply the laminate?? Edited 11 Years Ago by BlackNDecker
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The Fibreglass King	The Fibreglass King posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 69, Visits: 652	Hi blackNdecker, It does make quite a bit of difference to the gel coat if it's not applied at the optimum temperature. It will most definitely need more gel to cover an area thus be harder to even out because it's thick and you have to much gel on the surface. Your gel was probably be colder than the ambient temperature aswell! As for seeing Orange peel under a second coat it would almost impossible to tell if you have a really thick layer of gel! But saying all of that your gel coat looks a lot tidier 😁 Kind Regards The Fibreglass King
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Hanaldo	Hanaldo posted 11 Years Ago HOT Post Details
Group: Forum Members Posts: 2.5K, Visits: 28K	I wouldn't worry about orange peel anyway, you can flat that out with 1200 after.
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