Does your normal CO2 laser engraving machine can mark metal?

Does your normal CO2 laser engraving machine can mark metal?
As we know,normal CO2 laser machine can not mark or engrave metal materials,but ours can.
We have the helper,CO2 Laser Mark Ink!
Just lower power CO2 laser machine is enough,we can engrave on stainless steel,carbon steel,aluminium,galvanized sheet,titanium plate and so on.