I very afraid it will be very hard task for me with my english
In addition binocular, I have some wax carver like this: http://www.widgetsupply.com/dental-picks/carver-sets/SAC4-12PC.jpg
I put coin in water about 10-15 min. After this time metal oxide become lax and easy cleaning off by metal wax carver.
After clean small area of coin you need dip it in water again in order to wash off results of you work.
Attention! Wax carver must have NOT sharp edges!!!
Really, if You look in binocular even if one time - You will understand how easy separate oxides and good metal with help it. Very important advantage of this method - saving (retention?) of patina.
My opinion - using wooden tools is very low effective (very slowly and have not reason)
Of course before cleaninng you must separate ordinary finds and really interest artefacts! For very important artefacts I recommend to use homemade carver from plastic box of CD disk. In this case you can not affraid about sharp edges of carver because plastic more soft any metal. Except lead.
My guess is that Samurai Jack has done this more than a few times. I would recomend trying this on a common coin with no real value. Quality optics help.