Wet the material on a flat smooth surface and squeegee all the air bubbles out before you lay the first layer. Squeegee the cf between 2 layers of smooth material like release liner so you can see that all the air bubbles are removed. Wait until the cf starts to gel and become tacky before removing the release liners and then lay it in the mold. Once the resin has started to gel, no more air bubbles will be able to get into the surface unless your mold surface is not smooth or has cavities.