I am looking for advice over what sacrificial material I can use on my newly acquired CNC router. I am cutting out acrylic parts and have built a vacuum table to assist in holding the material flat but I need a sacrificial material to protect the vacuum table and cutter whilst at the same time allowing air through in order to pull a vacuum against the underside of the work piece. I will cutting out various size parts from 5 - 8mm acrylic sheets 1200 x 1200.
All help and ideas gratefully received.