The Peachy laser is not powerful enough to do that. A more interesting prospect (with less risk to eyesight) is to smear the PCB with the UV resin and print the pattern. The resin would hopefully adhere to the board and form the resist. Not sure whether the resin would form a suitable resist in terms of not allowing the etchant to undercut and not sure how you would get it off. But if it does work, this would be a brilliant way of making PCBs.