I'm having a severe problem with solder adhering to the FR4 PCB material. I made my boards (myself, my first time) using positive developer and etchant on a pre-sensitized board. I washed the etchant off with nail polish remover.
It's so bad, I can take the iron and "paint" solder on the board. Flux (kester flux) doesn't seem to help at all. I don't know why this is happening or how to rectify it; searches on google only turn up page after page of people who just don't know how to solder (i.e., "solder won't stick to board."
Any advice or insight is extremely welcome.
I scoured it per the advice given below, and to my surprise, the "PCB" came off and revealed that even though I could see all my traces, the whole thing appeared to be copper. Considering I tried to follow instructions to a T, what could have gone wrong here and how do I fix it (or fix it on the next board)?