Using Table Top Epoxy and getting bubbles

Accelerant cause an instant cure.

I precoat with shellac.

seal the wood. pour resin.put in pressure pot at 8 bar, promise it works best if u pressure pot sorts the problem out one shot

A pressure pot would be a great idea, but I am using wood that is 18" x 14" x .75". I couldn’t afford a vessel that could hold them.
Thanks though.

What about a short-stroke vibrating table? Something with a steel plate and an inductor with an iron core would be easy to fabricate. Ultrasonic may work, but might create more bubbles due to the resin viscosity…