What is this i don't even...
You mean if you do it because it's flavourful or is there any logic behind it? Do you maybe mean the wicked guitar? Would it take them to 11?
If that's what you mean, then, hmmm, I think their stats are capped as is, so the only thing that would get upped, if any, is the XP you can get. Maybe. If it even works. And I think you'd have to use it on each vawe.
I almost got pwned by Shifty Brickwork!