Board after stripping. The dark smudging is acetone/toner that seems to stain the board. I will try soaking toner off, rather than rubbing. Note the uneven edges and "pitting" that seems characteristic of the process. I suspect it's due to the way I've been fusing the toner using an oven, with no pressure. I'll try running it through a laminator after the oven and see if it improves the result.