I’m mentally exploring the idea of spray painting copper clad with spray paint and drawing traces in the paint with a laser. After the laser, the board is then placed in etchant and the copper exposed by the laser is etched away. I understand this is possible with 20W CO2 lasers by Youtube videos but has anyone explored this with a laser diode? Is the abundant ebay 445nm, 1W laser or the 808nm, 3W laser up for the task paint ablation?
Jeff