Adam, by pressure pack of solderable PCB you mean a spray can of solder mask? I've been looking for that around here but so far I haven't found any. I've seen it on some websites but I don't think such a thing can be send by air mail.
As for the slivers, I'm sure it's the little cracks on the ink. I just took a couple pictures and with the camera macro the cracks look a lot worse than I thought.... =/ I think is a mix of the wrong film and too much ink on the printer settings. I think a laser printer should work better.