Quick note for people with the Ortur Master2. It has a huge problem engraving on white surfaces. I tried your method and I got no results. However, when I switched to black paint (and inverted the image), it worked beautifully. So, I guess it depends on which diode laser you have.
Otherwise, great method, and thanks so much for the info. I will be trying some canvasses and tiles with this method and I’ll share my results when I’m done!
