Carbon skinning final sand problem !!


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Matthieu Libeert
Matthieu Libeert
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CmCarbon - 4/11/2019 6:55:49 AM
I like how it flows,  self levels and bubble free,  I always had issues same as this post.. I only used the resin on s work bench with heat lamps which kept the temp around 30 degrees,  resin was always kept warm and still I had white lines when sanded,  parts turning milky and pinholes..

If you need to use heat lamps on top of your part isn't mostly a good sign BigGrin in best conditions you have your part in a room with very low humidity and constant temperatures (part and resin) at around 23°C the entire cure. meaning not just while it is curing and feeling hard but full 48 hours. 
before sanding it, make sure the resin is "fully cured" not just "feeling hard". I let my parts cure for 72 hours after last pour and even postcure them till 55°C to avoid having the mistakes above. 
by all the above I'm not saying you cant use this resin in your garage or shed with a heater on the part, but it will make it harder Smile 


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




CmCarbon
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I like how it flows,  self levels and bubble free,  I always had issues same as this post.. I only used the resin on s work bench with heat lamps which kept the temp around 30 degrees,  resin was always kept warm and still I had white lines when sanded,  parts turning milky and pinholes..
Matthieu Libeert
Matthieu Libeert
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CmCarbon - 4/6/2019 11:29:26 PM
If your skinning I just use surf board poly resin. .crystal clear, higher temp rating.easy sandandcuresin 10mins if it's warm
. final coat adds me wax additive and seals and cures so it can be sanded

I personally think the XCR resin is an excellent product for skinning pieces. I don't skin that much pieces because I prefer using moulds and resin infusion or prepreg, but when skinning pieces XCR is the best resin I've tried so far. Never had problems with it so far. Just need to be sure to mix it well and use it in the correct conditions like on the TDS. 
Most important thing is to use it in a stable environment, so avoid having big temperature changes. 


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




CmCarbon
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If your skinning I just use surf board poly resin. .crystal clear, higher temp rating.easy sandandcuresin 10mins if it's warm
. final coat adds me wax additive and seals and cures so it can be sanded
Lillee
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Aww really what product is better that doesn't do this and thank you I will apply some
CmCarbon
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Wipe it with acetone,  I hated xcr resin.. it does this all the time and why I stopped using it
Lillee
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Matthieu Libeert - 4/4/2019 7:12:30 AM
when you wet it out with just a bit of water, do you still see the marks? if not you are ok to apply next layers on top. It is probably where you've sanded through different coats 

When wiped with a wet micro fibre you still can see the marks, what would you advise next??

Matthieu Libeert
Matthieu Libeert
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when you wet it out with just a bit of water, do you still see the marks? if not you are ok to apply next layers on top. It is probably where you've sanded through different coats 

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




Lillee
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CmCarbon - 4/3/2019 10:14:52 AM
Try pic of any loose resin and sand it back.. then reapply another few coats of resin

Thank you very  much I wil 're try 

CmCarbon
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Try pic of any loose resin and sand it back.. then reapply another few coats of resin
GO

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