I’m still relatively new and working with resin. Im sure I am the typical “Isaw it on YouTube and I want to do it do” person, but hey we all got to start somewhere. I am an electrician, but I do a little bit of everything so I own a handyman business, so I figured this would be something I can handle. Recently while working with some mango I attempted to pour a river table only to find after the resin cured there were these air waves that developed. I figured you might be because I did not seal the wood and moved on. Later pouring into a square tube mold the same problem occurred. I submerged a handful of seashells and floated a little turtle sculpture made out of wood in the middle. He looked great but sure enough the waves developed again. Why is this happening and how do I prevent it?