hi! 

I had a problem trying to cover with carbon the tailgate of my citroen C4

Before applying the black gelcoat, sand it and clean it thoroughly, then apply and let dry carbon, after 3 days drying, I began to smooth the carbon layer, but note that in an area came as a bubble, but it was the carbon that had taken off from the part

Now already removed all carbon, and sanded again, but the layer appeared after removing the carbon is not the same as that in the first sand

As I can do to cover this piece? had planned to do with polyester?

See if you can help




Thanks

Do you have any pictures? it would be a bit easier to understand the problems you are having

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

yes same here so we can help you out as mainly we skin carbon on top of oem parts.

Sounds like your epoxy coat did not bond to surface,or when you layed down your fabric that area did not stick down,on flat area use a consolidating roller and make sure fabric is sticking to the epoxy.

i think it was paint that started to come out on a part and that cause these things reaction. so always sand those things and try to brush paper dry like 80-100 grid

hi thanks for your answers 

I think the problem that is to come up paint that came in the trunk, the basecoat lifted well in the part, typically carbon already pressed against the basecoat. Now the piece is clean, there is only one layer of a kind of black paint primer will, and in some places only the plastic

I'll upload photos later

What should I do now? abrade with 80 back to start?

i think you can brush with 100. then apply what you want. strange that epoxy reacted like that as normaly polyster resin and gelcoat kick out paint. But like i stated before it was paint and paint almost always reacts like that. Hope it helped.