I also posted this on the camheads forum.
I may have to make a 4x6' two sided sign as a follow up to my draft sign. I could use some advice on choosing material size and hanging method.
Polycarve is available in 1/2 and 3/4" thickness. I can get 1/2" material for about $180 per sheet or a 4x10' sheet of 3/4" for $360. This will be supported between two posts as far as I know. I'm thinking the two 1/2" sheets would work better for the following reasons:
Advantages
Less risk - if I botch a tool path and ruin a piece of material, then I would ruin at most $180 and at most one side of cutting time.
Hanging - I think metal brackets would be easier to slide between two slabs for support and there would be a full inch of material
Disadvantage of two pieces is having to sandwich them together. I'll have to use some stainless bolts and washers or adhesive (not sure it will stick readily to this) and paint the heads to not show. Also, I get a bit less surface area - those extra pieces can be used for the client for some miscellaneous use.
I carved to a depth of .25" on my draft sign - I'm thinking this might be too deep for 1/2" material and certainly to deep if cutting on both sides of a 3/4" sheet.
Also, on pricing, do you have a ballpark estimate what you would charge? I already gave a price that I won't advertise here but I made it very reasonable because I want to do this particular sign and I haven't used this material before.