Hi there.

You can use a light mist of Aerofix 3 to spray the back .

What Chris says is correct,

One issue I've had in the past with spraying glue on the fabric to avoid fraying is that it also significantly reduces the drape of the fabric, so if it's a complex shape, be careful to only spray where you are going to cut, and lightly too

Thanks very much for the helpful replies. I'll give it a go and spray carefully.

I would add, just a little spray as advised but then leave for a short while until the area loses its tackiness, it can start sticking everywhere otherwise.

I have a technique that I use to put a very thin layer of toilet tissue onto the carbon mat.  You will see it all here:

https://www.youtube.com/watch?v=RGLoA0hP2jY

There is a change to the technique shown here, though. When the tissue gets damp it expands.  Now after I have laid the dry tissue onto the carbon mat I damp it slightly so it expands and then very gently pull the wrinkles out.

Please be aware that PVA can stop the carbon from bonding, so it may weaken your product slightly.  I have never had any problems, myself.