Skinning project went a bit wrong!


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Credostar
Credostar
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Hi Hanaldo. Before I've started the project I've watched every possible video on the internet regarding CF skinning ... watched the Carbon Mod's video and EasyComposites ones also. Followed the right ratios when mixing but I've found that every time I've put down the basecoat on the 3 parts that I've skinned the basecoat was I think a bit to thin (watery) and wasn't as You said to tacky also. I've used normal CF 2x2 twill weave fabric and not the 'Pro Finish' one as I wasn't too sure if it will be very flexible to go on all the lines.

Yes I do think that with skinning the best way it will be with a vacuum bag because like thatl the material will take all the lines and won't come off.

What kind of bags can You recommend me for skinning, because I saw that on infusion projects they use a few materials also, and won't the bag be glued on to the part also because of the resin?

Thanks
Hanaldo
Hanaldo
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I'd say the basecoat was not tacky enough when you put the fabric down. Otherwise, what fabric did you use? Did you try to use EC's 'Pro Finish' fabric, with the binder on it to hold the weave together? If so, I suspect this would have caused issues as well. The bound CF fabric doesn't conform quite as well as your standard 2x2 twill weave fabric, it can bridge when the object is too complex.

I used to try skinning things, but I found it a real pain in the ass without vacuum bags. If you wanna give it another go, I recommend trying it with some vacuum bag. I used to use just standard clothing vacuum pack bags, which worked well for that.
Credostar
Credostar
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I've took my time with every step, followed all the instructions, sanded down, laid 3 coats of resin in total, at the end sprayed clear coat as the instruction. The biggest disappointment for me was that the CF fabric didn't stick proper on to the plastic part so was ruined from there. Waited for the basecoat to become tacky as the instruction, followed the correct mixing percentage on everything but unfortunately I probably didn't do something right, and can't figure it out ...
Matthieu Libeert
Matthieu Libeert
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In working with carbonfiber there is no fast way, you'll have to do a lot of trying before getting it right Smile
I suppose you used a gelcoat? you have to have the perfect timing to get the carbonfiber sticking perfectly to your part. 
I'm talking about those 30 minutes you have, you may not be to early or to late. Its that moment when it is feeling strong, elastic not soft but still sticky.
Then you add your fibers with a lot of care (to get the nice lines) and add some resin on top, then you sand, add resin, sand, add resin,... till you have an even surface.
polish it add a clearcoat and you'll have a nice part!

You can imagine how much time goes into that? I guess making your part took a bit less time Smile

Matthieu Libeert
Founder MAT2 Composites X Sports
website:
www.mat2composites.com




Credostar
Credostar
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Hi!

A few months ago I've done a project and skinned some plastic parts from under the hood, engine area.

http://www.talkcomposites.com/Uploads/Images/1bcbb114-fc33-411e-bbda-8b39.JPG

I've followed all the instructions but for me the basecoat didn't work at all and it didn't keep the CF fabric on the part at all. As I was applying the resin, the CF just came off from the plastic and the final part doesn't have all the nice lines. My first and only project as I saw that it didn't work on any of the 3 items that I've skinned.

I'm attaching some pictures with how my items ended up from my project:

http://www.talkcomposites.com/Uploads/Images/37967fe8-4e24-46c2-a6c8-2365.JPG http://www.talkcomposites.com/Uploads/Images/1ea5ac7b-ed16-48f3-a787-16d2.JPG http://www.talkcomposites.com/Uploads/Images/395dcf17-697e-45b3-8332-0a2b.JPG

 http://www.talkcomposites.com/Uploads/Images/cf1d180a-e31f-492e-bd29-eda0.JPG http://www.talkcomposites.com/Uploads/Images/5c6201df-6cbd-42ba-8834-44f2.JPG

And the professional items should look something like this:

http://www.talkcomposites.com/Uploads/Images/54215180-b411-4c6c-9769-219a.jpg http://www.talkcomposites.com/Uploads/Images/08869e36-2266-4ada-bdc5-d4a7.jpg

Any idea why the why the CF fabric didn't stick completely on to the plastic and came off as I was applying the resin, why didn't the basecoat hold it proper? Should I have left the CF fabric on to the base coat longer to glue proper?



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