When I make PCBs I place the PCB in an etchant bath and agitate the bath. I saw a video on line for making PCBs and in the video they poured just a small amount of etchant over the PCB and rubbed the board with a sponge. Has anyone used this method? Does it work? Seems there would be a lot less waste using this method.
Yes this works very well. But be carefull, you can simply scratch the protecting mask which is over the copper.