Hi to all My name is William,I am a newbie to this group,I only have an old detector and a bung hip which allows me to only look and learn for the present,however I do have another hobby that of coin collecting and the rule of thumb with coin collectors is never to clean a coin you think may be valuable,so if you find a 1923halfpenny,a1946 or 1925 penny definately don't clean these lots of luck with your detecting regards William,known as bigmaxno1