I use a basic cleaner on the other frames such as dawn dish soap on the finger and warm water. An old toothbrush whose bristles have been worn soft is an amazing tool for the tight spots as well. The original finishes I am pretty gentle with.I gotta say, even the before and the cleaned stage don't look bad at all. But the final product... amazing!!! Liquid metal is a very appropriate description.
I assume this cleaning process works only with the polished frames right? Wondering if there's a method to get the other frame models to really pop.