I have just inherited a PPK in .32 ACP. Based on the serial number it was a 1941 manufacture; says Thuer (can’t do the umlaut) on the barrel so original factory. It was not well taken care of. A lot of the bluing is gone, it was filthy inside, and I had to use Brasso on the exterior just to read the manufacturing information. My question is - what is normally done to clean up an old C&R like this when the condition is far from 100%? The action is smooth and after a normal cleaning, the barrel looks good inside. It has one original Walther magazine that also needs a major cleaning. Do I just do a slow detail cleaning with regular gun cleaner and toothbrushes? Do I use Brasso or something similar on places like the outside of the barrel and the slide? I’m not planning to sell it - just shoot it occasionally and keep it as an heirloom. Thanks.