Solder warriors, how do you protect your etched boards from corrosion?
I bought this one a lifetime ago. Clearly homemade. It's covered with rosin.
I thought rosin was corrosive to the traces.
What technique is this? What kind of rosin is used here?
Many cool answers, but the most interesting question still remains.
This board looks like it was covered in rosin deliberately, as a protective layer.
I failed to find any guides about it. Anyone with hints?
