+x

 

Common fault - 8/11/2020 4:49:43 PM

Hi all, 

I wonder if anyone can help.

I finally took the plunge and decided to carbon skin some of my car parts.
I followed easy composites YT videos to a "T" however it looks like I'm getting some kind of a pits or bubbles. Can someone advise what am I doing wrong? 

Thanks

Diana

+x

 

LibertyMKiii - 8/11/2020 8:00:29 PM

+x

 

Common fault - 8/11/2020 4:49:43 PM

Hi all, 

I wonder if anyone can help.

I finally took the plunge and decided to carbon skin some of my car parts.
I followed easy composites YT videos to a "T" however it looks like I'm getting some kind of a pits or bubbles. Can someone advise what am I doing wrong? 

Thanks

Diana

That is pretty normal from my experience.  It generally takes lots of sandng and re-coating with epoxy.
I found their tip about re applying at the 2 hour mark while its tacky to be helpful.

+x

 

Common fault - 8/11/2020 8:09:48 PM

+x

 

LibertyMKiii - 8/11/2020 8:00:29 PM

+x

 

Common fault - 8/11/2020 4:49:43 PM

Hi all, 

I wonder if anyone can help.

I finally took the plunge and decided to carbon skin some of my car parts.
I followed easy composites YT videos to a "T" however it looks like I'm getting some kind of a pits or bubbles. Can someone advise what am I doing wrong? 

Thanks

Diana

That is pretty normal from my experience.  It generally takes lots of sandng and re-coating with epoxy.
I found their tip about re applying at the 2 hour mark while its tacky to be helpful.

Thank you. 
That's what I've been doing - re-coating with epoxy every 2 hours. Ok, I just thought I'm doing something wrong  
I did manage to get rid of all the "defects" with 400 grid. 
Thanks

+x

 

LibertyMKiii - 8/11/2020 9:41:23 PM

+x

 

Common fault - 8/11/2020 8:09:48 PM

+x

 

LibertyMKiii - 8/11/2020 8:00:29 PM

+x

 

Common fault - 8/11/2020 4:49:43 PM

Hi all, 

I wonder if anyone can help.

I finally took the plunge and decided to carbon skin some of my car parts.
I followed easy composites YT videos to a "T" however it looks like I'm getting some kind of a pits or bubbles. Can someone advise what am I doing wrong? 

Thanks

Diana

That is pretty normal from my experience.  It generally takes lots of sandng and re-coating with epoxy.
I found their tip about re applying at the 2 hour mark while its tacky to be helpful.

Thank you. 
That's what I've been doing - re-coating with epoxy every 2 hours. Ok, I just thought I'm doing something wrong  
I did manage to get rid of all the "defects" with 400 grid. 
Thanks

You can see why people end up going with Resin infusion moulds.
All the mixing, sanding, labor is pretty awful if you plan on making these parts often.

+x

 

MarkMK - 8/12/2020 6:37:28 AM

The coating resin is naturally thicker than laminating resins, so air entrapment that can cause low spots in the cured finish is always likely to be an issue, unfortunately

Allowing the resin to stand for a little while before applying can help, though, as craters can be left by air bubbles popping at the surface without levelling again. Try not to over brush during application as well, as this will only cause more air to become mixed-in that might not have time to escape before the resin starts to gel. 

If you're working in cooler temperatures (below 20 degrees C), warming the resin a little and keeping the part in a warm-ish place will help

Another source of imperfections can be little nibs of dust that settle on the part during cure, so it might also be a good idea to place something like a plastic storage box over the part once it's been coated.