Rescuing carbon fiber

[Frh076 2]

I have built a big rc airplane out of carbon fiber. The whole thing is done correctly, except one part of the right wing. Here, i mixed incorrectely, and the carbon is therefore only semi-hard.  What can i do to save it? Can i add more epoxy, or something else? Please help

[ThunderDragonCy 7873]

You need to add more hardener if you can. 

[Kevin_Mc 411]

I would say the same - more hardener and a gentle heat with a hairdryer 

[nbTMM 433]

If it has cured partially and is just softer than usual, you may be able to heat it up to speed up the reaction and get it to harden. Putting it out in the sun for a day or two should do it. 

If it hasn't cured at all the best way is to scrape it all off, sand back until you have only fully cured resin on the workpiece, and start with a fresh batch of resin.