No quite so simple Buddy13. DLC can be applied several different ways such as
Ion dep of carbon
RF plasma dep
several CVD processes.
BIggest issues with DLC dep no matter the method are that in general the films are pretty thin and that surface prep is key and easy to botch. Previous poster (cyanicotes) that mentioned that a good coating is available from expert vendors is correct. the seperator for shoddy and good is as often as not the surface prep. All are not equal. Surface prep and chamber cleaning are boring and unsexy jobs that seperate the men from the boys.
By the way congrats on graduation Buddy 13. Materials are a great field.
for reference I'm also a ME and material scientist with a fair bit of experience with DLC sputtered on plastic and the like. I would suggest that who you buy from is perhaps as important as what you buy in this arena.