so i got the gm sloted/drilled rotors roughly a month ago and i thought that these were zing coated... mine look terrible i have surface rust everywhere whats going on here... did i jus get screwed or what lol all i know is that with the rust my stockers looked better because i didnt have drilled rust holes everywhere lol

 

I would return them,I have the GM performance rotors(non-slotted) and zinc coated and I get no rust