[amelius]

Yes, that's bad indeed.

However, I've ordered from PCBWAY quite a lot recently, and I've never experienced anything like this, even on prototyping-quality boards. Also, the solder mask is much thicker (pcbs don't look semi-transparent like this one), and look more professional (I didn't order any assembled boards so I can't say anything about their soldering job). How long ago did the author order these pcbs?

The defect could also be the result of the author trying to fit the pcb into the keyboard.

Anyway, rest assured, on current PCBWAY boards traces are covered under a thick layer of solder mask and it is extremely difficult to remove them from the board (I just tried with a sharp metal tip on an old board).