Was looking at you tube on these and how they powered them up to burn foam/rubber/wood....good for etching letters in wood and plastic,do you reckon if they will etch into the surface of Aluminium just for name plating legend text on the Ally?

Was thinking of making a very small CNC just fo laser purpose etching,it willbe 20"x26"x8 to 10".

Got a few printer steppers and are great little motors,alsohave some 10mm stainless steel rods to use as the supports.