In early 2003 I made a successful functioning overhead catenary with MTH telegraph poles.
in 2005 I sold my layout and trains and accessories to a buddy of mine. He took down the overhead as it was not something he wanted on the layout. The poles went into a series of boxes and were stored with an ensueing coating of dirt and dust in his garage. On a visit to him, he asked me if I wanted them before they disintegrate! Being that I am in the process of rebuilding that layout trimmed down a bit, I was happy to bring them home for a second life.
I have started the task with a vavumming, then brushing of finer stuff.
So, there still is dirt. The brasshorozontal portions that I fabricated as arms I know how to clean. The factory painted MTH poles I am not sure about. Any ideas as to cleaning them without potential damage? They are a thing of beauty to be resurrected into function.