Can't use pressure pot

I have a project that because of the size I can't use a pressure pot. The project is a large piece of wood that I want to fill some voids with a clear so I can tint with color and it still be translucent. There are approximately 20 voids to fill most are 3"X3" or smaller. This will be turned after all of the voids are filled. What product is best for this project? And should I do multiple pours to keep bubbles out?

Thanks for the help