The ability's description says, "removes added affects to increase move damage". Would the special attack not be lowered, or would it be lowered anyway, or would it not have an affect at all?
Sheer Force only removes positive effects, so No.
No, it does not. I thought the same as you at one point, though and I was sad when it didn't work :(
Source: Experience with Overheat on Darmanitan
Those moves have Recoil effects not Added effects. Added effects are like, 10% chance of paralyzing. So no.
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