Interesting, look what Cooldayr tried:
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I've thought about this too, but since the V-Cubes aren't adjustable, the thought kind of made me nervous. But for tight V-Cubes, it would probably good idea. Oh, & the dirt in my Gigaminx didn't help much, but the bumpy feel on the outer layer seemed to be reduced. The same thing would probably help a V-Cube 6 after it's been modified.
Thanks for uploading this Cooldayr.