Hi - 

I have a seasoned carbon fiber mould (picture attached below) that I've used for several resin infusion skateboards.  Currently there are spots of carbon fiber showing through.  From the start, I never put a layer of gelcoat or primer on it, but instead only applied wet lay up epoxy and mould release + pva film to release the part.  I built up the mould on some XPS shaped foam with wet layup. Now I've got it back to a smooth surface with some 320 grit sand paper.  What's the best way to get this back to a perfect finish for a mould?  Is it possible through infusion vs. painting?

Thanks -