I don't "run" my guns or "run" anything on them. Likewise, none of my guns are "platforms". I hold them up, not the other way around.
Sorry to hear about this OP. I say send it back. Not sure why some others on here are dishing out heat just because its a clone. Being a clone is irrelevant. You purchased a new gun and it wasn't up to par clearly by the photos. Get your money back or exchange it for one that does not have the terrible paint job.
My recent Z5RS purchase is also a "19" gun( 2nd batch). I looked it over pretty well when I received it and broke it down for a good cleaning and lube before hitting the range. The paint on the bolt carrier, that is seen through the ejection port, was not done as well, as it could have been done. The problem was the lower area was not fully painted. It took me a few minutes to correct it, and I was o.k. with it. Two(2) other very small spots were found, and corrected, also. To date I have put 300 rounds of Winchester 124gr FMJ NATO ammo through it with ZERO problems!! I have tried it with MKE, HK, POF, ATI, and ETS mags, and it likes them all. I am a "happy camper", but can understand how other guns may not be as nice as mine.....perhaps I just lucked out. I would/will purchase another Zenith/MKE firearm in the future.