Hugh,
Picture as promised, actually looks better in real life, more polished but the striations are still there. The other bit is 3mm and this cuts OK.
I'd imagine that 8mm will cut OK without marks but not tried it because i don't have any.




Michael makes a good point over cast and extruded but to be honest I don't know what this material is? just some kicking about.

Laser is an A3 unit and cost 3K but you can get some from China for about 1.5K

I bought from the UK, HPC laser as I wanted UK support.

Perfectly willing to run some test pieces for you.