I have recently been given a Detonics .45 by my father who bought it from a friend. It is very rusty and the bluing is coming off. I have no idea how to disassemble this gun and clean it. From what I have been able to find out, this is a fairly early model. Production # 2030. Any help would be appreciated, I can take apart a Beretta 9mm but this detonics has got me perplexed.