Another tip with draw filing. Get the longest single cut mill file that you can find. That will allow you to change the sections of the file that you work with as you cut the bevels of your blade, remember that the file has two sides also. Make a few passes draw filing and then move down to a clean secion of the file. After you have used all the sections on both sides of the file, clean it with a file card and start over. If you don't know how to draw file, which is basically scraping the file blade across your work sideways, google it up and you should see some examples. You can cut on the pull or push, but not both, depending on if you hold the handle to the right or left. I would suggest that you get two different mill files one course cut, technically known by a "naughty" word beginning with a "b" that denotes illigitimate birth the the nanny program on this site blocks so I can't use it, and a smooth cut mill file. Again both single cut. You probably won't be able to find a single smooth cut mill file in any of the local hardware store and maybe not the courser single cut mill file. MSG Direct or other on-line store that sell files will have them.
Yes, you will give your arms a work out, but look at it this way, you won't have to join a gym to build up your arms.
Doug Lester