Hi all,
i'm new to the forum so excuse me if this post is in a wrong place.
So here is my problem:
I'm looking for a decent material to use for my DIY CNC router cutting bed (working area of 800x480mm). I need it to resist moisture as my router is in a garage that gets really damp during winter, and my current bed (plywood + mdf on top) expands and contracts like crazy.. I do a lot of V carving so a flat bed is a must.
So at the moment I'm considering 20mm thick acrylic or 20mm HDPE sheet. I'm looking to spend up to £100 if possible. The entire bed size is 1100x620mm.

So what do you guys think I should do? I just need a material that will resist moisture and bending.

CHeers, Kamil