How do laser and laser engravers work?
Are the following posts correct about the way that a 3000mW/450nm engraver would interact with my barricade pic related, in that it would only make it worse? The laser engraver is a class 4 laser
>>>/g/84471491
>>>/g/84471613
>>>/g/84471529
>>>/g/84486003

So in resume, am I in danger? Is he accurate in his assessment?