Make Your own DIY Honeycomb Bed For Your Laser Engraver 

www.etsy.com/uk/shop/MBWKDesign

But doesnt it burn out over time?

With an Omtech 55cm x 70cm honeycomb costing £40 this seems like a lot of effort. I know not everyone has the money, but the time and materials used here could be used more profitably. And there is no easy way to clamp a piece of warped wood. The honeycomb is either magnetic, like the one mentioned, or can take clamps.