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


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BlackNDecker
BlackNDecker
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Greetings all, 
I just discovered this website and it looks like a great resource for novices like myself. I've been trying to mold my doors but have run into repeated failures.
I've posted this previously on compositescentral.com, but was hoping to get some feedback from you all.

I cleaned my door and flanged it, then sprayed several coats of PVA (next time I will use mold release). I then applied gel coat with a roller and brush. The temps were low when I applied the gel coat (approx. 49* F but I mixed extra MEKP and have had success even when allowed to set at -10* F).

Here is a pic of the door after the gel coat was laid down:
http://i736.photobucket.com/albums/xx10/swolehead/null_zpsceb0206e.jpg


So I when I checked on it this afternoon (approx. 16 hrs later) I noticed a new problem I've never seen before with gel coat...it pulled away cleanly from the plug in some areas. Would this be due to nonuniform thickness?? 
http://i736.photobucket.com/albums/xx10/swolehead/null_zps6a8f37b2.jpg

http://i736.photobucket.com/albums/xx10/swolehead/null_zps67c25460.jpg
Edited 11 Years Ago by BlackNDecker
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brainfart
brainfart
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Silicone is very very bad! It's like teflon, no liquid resin will adhere to it and it wants to creep away from the silicone due to its surface tension.

Hit your reset button, watch the excellent instruction videos on youtube again and start over. There's really no point wasting lots of money and material on full sized car doors, take a small worthless object and make a mold of it, testing ALL your materials and procedures. If you fail, start over and correct what went wrong. You will learn more from 10 failed small trials than from one failed big attempt. And maybe the eleventh attempt will result in a perfect result. Only then should you consider bigger projects which might cost you lots of invested money and time.

This is a journey. Every journey starts with a few small steps. If you fail only one of them you won't reach your destination. So make sure you take those first steps properly. And on't take shortcuts because you might end up in a dead end. Others have walked this path before you, follow in their footsteps. Don't try to build a bigger, better mousetrap, just use one that is proven to work.

Yoda - out... Wink
Edited 11 Years Ago by brainfart
Devin Wang
Devin Wang
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AD

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