After pouring your epoxy, it is common for air bubbles to form. Bubbles can continue to develop for 60 minutes after the curing process has begun. The most efficient way to get rid of them is to run a blowtorch over the surface of your resin.
TIP: if you are pouring epoxy over a porous material such as wood, be sure to do a skim coat of epoxy as a seal coat first before flood coating, in order to prevent air from being released into the epoxy during the flood coat. Wait for a minimum of 6 hours after skim coating before applying the flood coat.