Talk Composites - The Forum for Advanced Composites

Carbon skin : piece full of pinhole !

http://www.talkcomposites.com/Topic36718.aspx

By Filippo Casetta - 5/17/2020 8:57:18 PM

Hi, i've got a problem on carbon skin. I start with premise that I have already made several pieces, various with transparent epoxy resin not well specified and many with the XCR, however always with excellent results. 
This time i try to make a piece with the EL2 resin always from EC. It is a piece on which I have no great claims, it's for my garage, so i thought I'd try to do it with this resin and then give it a final coat of XCR just to finish it . 
The problem is that after having given the three coats of resin and sanded everything with the 240, I find the piece, as you can see from the photo, full of tiny pinholes!
How did such a thing happen? I followed the usual steps of the EC skinning guide as always, but never has such a thing happened to me! Maybe 2 pinholes sometimes, stop, this piece It is completely full of them!
Is there any way to solve it?
The photos were taken after the piece was washed with soapy water.
By Warren (Staff) - 5/19/2020 9:46:32 AM

Sand through the bubbles if possible then over coat with fresh resin.