What kind of cutting are you using?
We've tried a few, and had different results with them - some working well on white aluminium, and another only working on clear finish.
Also, what is the edging like - is it jagged or burred in anyway - does it need additional filing/sanding/polishing after your cutting?
Can you post a high res/macro image of the edge to show the cut/finish quality please.
What will your price break quantities be?