The acetone or alcohol should not add any oil or other unwanted organic material to the board. As long as all of the cleaner is removed from the board I'm not sure there is any benefit of using acetone other than helping remove traces of water quicker.
You should clean the board shortly before you use it. If it sits around or a day or maybe less depending on the environment it will pick up a film of organic material and will also tend to oxidize.
As to toner, you may need to experiment. Most people say that Brother brand printers do not work because toner has a higher melting point. The general consensus is that toner from the original manufacturer tends to work well. Replacement cartridges from other sources may or may not work well. The claim is some suppliers use less plastic in their toner mix (the plastic is what gets melted and binds and fuses the toner to the paper). If true, it is probably not the cost of the plastic as a raw material which is so expensive but the cost of producing it in the small particle size required. What makes up the rest of the volume when less plastic is used I have no idea, possibly more pigment or some other filler with a small particle size.
Craig
---In Homebrew_PCBs@yahoogroups.com, <unclefalter@...> wrote :
Thanks muchly and one other question if I may.. does it make any difference using original vs reman/compatible toner? I have compatible right now. The only thing I have with original toner is my big Minolta copier.
Also just a clarification.. if I use Comet and then acetone won’t that leave me in the same place with respect to oils?