Go to the store and get a cheap hand edge tuner, they are like 20-40 bucks. They take care of the sidewall really well, and then just get a file and wrap the handle end of it with duct tape 3 times over, and that is approx. the 1-2 degrees you need on the bottom edge...the bottom is less important though and takes less precision just for a clean-up job, so I would get the tuner for the sides.
Also, get a gum rock just for cleaning up the edges when they get all ripped up.