Hello,
I have a question about a problem I am having. I know that it is not advised to use spray adhesive when you want to create visible carbon parts with infusion BUT, I am in the process of creating quite intricate airbox design which consists of 3 main parts one some small bits and pieces, but the main shape is the most complicated one, it is 2times split mould, one I manage to infuse in one go, the second shape needed to be infused separately and then joined together in mould.

My question is, i have quite a bad surface finish and I would say it is most likely due to using spray adhesive, but in my opinion it is not possible not to use one becuase of the compliacated shape the mould/part has. It also leaves residue in the mould after releasing and it can be cleaned off with acetone, but then i am worried that it will also wipe away separator (i am using Semiperm™ Monofilm)

For spray adhesion I use INFUTAC clear - which states it is suitable for visible carbon parts...

The proces of what I had to do now was to clear it with layers of resin and sand it down and after that apply final matte clear.

Below are pictures of parts out of mould.
What would be your advice? I want to try spraying the adhesive on the fabric instead of mould, but i dont know if that will help something.

I am fairly certain that in the first picture the surface finish is not only due to the spry tack.

However, instead of workign with a in mould coating as proposed before, i would personally change the spray tack. For those applications i had good luck with the isotacker from sicomin. It doesn't work as well as the aerofix 2 which we usually use, but when basically used as a contact glue with a thin mist on fabric and mould it is reliable enough and leaves no visible trace if you don't overdo it.

cheers, Lester