I was wondering (since I never did that before) how can I protect my hand-made PCBs?
I'm reading there's a silicone spray and other stuff that I can spray paint on the copper layer of my pcb (I make those once with the toner transfer method, awesome!) in order to prevent oxidation (that's my main concern, more than then mechanical protection againsts let's say scratches).
What would you suggest? I'm not looking for industrial-professional quality grade here, I'm a part-spare-free-time Arduino fan, I'll settle with a commercially available product that gives a reasonable protection of the copper and solderings over time against oxidation.