On 8 Feb 2017 at 10:31, Dennis Monticelli wrote: > > May I suggest the plastic front of a common CD or DVD case. It is about the right thickness and > flat. Any scratches are easily polished. Yes. Brasso works wonderfully to polish plastic. Ken W7EKB --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus