Struck Through Grease 61 Penny Counterfeit?

Well generally speaking DBM what if a planchet already had something like that on it before it entered the striking chamber, what would it look like?..not like a grease strike thats for sure.
Don't get me wrong my first observation I thought PMD too as we have seen these here before...just trying to figure it out thats all.

The obverse was brushed with a Drexel from left to right. The reverse is vertically. Look how metal is moved to the right on the obverse. Almost no distortion on left with extreme movement on right. Cloth brush.

Looks like someone took a brand new 1961 cent and treated it to an acid trip and / or a mechanical touch up with a grinding tool Whatever , it never left the Royal Canadian Mint that way. As SPP stated it should be a tad light in weight. Most assuredly nothing but PMD.
There are excellent research articles and books available on the subject of Coin errors. Also if you do not believe any of the experts on here you can always pay some money and send it to CCCS or one of the major US TPG. They are all going to give you the answer you still do not want to hear.
A lot of us experimented with coins when we were younger . Lots of fun . Rock Tumblers , hammers , Mercury , shears, acids , Coca Cola, vises , shop class, drills, electricity , railroad tracks. Just some of the weapons of choice to destroy perfectly normal coins and make them errors.
Enjoy the hobby and let us know how you make out with certifying your "error " cent .