The main thing a new P-64 requires is a good cleaning and lubing before firing. For some reason, they put a LOT of preservative on the pistol. At least it does protect it from rust, so probably not a bad thing. Another thing to remember is this was made under Commie rule, so the workers did not clean the pistol of all the fine dust and chips during assembly because the soldier it was issued to was supposed to completely clean before firing (the US M-1 Garand had to have this done during WWII to remove all the cosmoline).
This is one of the best small pistols I have ever found, but it does need a little TLC to be perfect. Cleaning and a little polishing makes it the most accurate small pistol made that I have ever seen. Plus it is all steel. The Poles are very good arms makers even under Commie control. If this pistol were made today for commercial sales, I think it would be a big hit. The only problem is it would cost about 3 times as much as the surplus pistols do. Of course, it would have any burrs removed, and the interior cleaner. As to cleaning, buy any new pistol from Kahr, Ruger, etc., and the instruction manual staed it needs to be cleaned before firing.