Doesn't matter what quality the kit is, it degrades the weapon.
Tested with a ruined, damaged, worn and Pristine weapon cleaning kit had the same results.

Good to see others reporting this rather than abusing it! :)

New version update, can still do this, harder again, basically with quicker servers and wait times to join the gap is small but can still be found. but I persisted as guys who rely on this bug will and you can still do it.

I will check in the up coming update too, sorry my update took a while simply rushed off my feet in Uni at the moment.

Anyway once again thanks for the help with this issue guys.

As Far as I can tell it has been fixed with the server queue system! Could not do it myself and I know no one who can.
Not seeing anyone with identical gear now unless it is easily acquirable stuff.

EDIT: Nope this can still be done but is MUCH more difficult. Will not give details but it is still a bug.

@Matt, I have emailed you with the information, I believe you may be confused as this was not my server but one of my favorite servers, I could tell the drop in performance solely from how long loot took to appear on the floor, went from near instant to taking roughly 20 seconds. On newly reset, and empty servers the sweet spot is almost impossible to find! It has to be a fairly full (20+) or laggy server to work.

Thanks for all the support guys! Still able to do this in the new update! Hopefully this issue will be sorted with the combat logging/server queuing patch Rocket has been talking about!
Getting tired of seeing whole clans with identical gear and those 0.2% drop press vests.
Edit:I agree with hiding this, is there any way I can hide this thread to Devs only myself?

Similar to my issue, loot duplication is pretty rife.
http://feedback.dayzgame.com/view.php?id=3688