I would tend to think, intuitively mind you, that if the polish is doing any increased binding whatsoever that it would be gripping the two 90-degree apart sides more than the rest and releasing more unevenly from the case neck. That would hurt, not assist, accuracy I'd think.
If the polish isn't gripping enough on those two sides to do so, it's probably not gripping enough to benefit anything either. If it doesn't hurt it doesn't hurt, but whatever extra time it takes (minimal or not) is probably not worth it. Ain't broke don't fix it. Fixed, don't break it.