I have used NuFinish many times.... it's in the assortment of 10 or more car polishs I have accumulated over the years in my garage for car use. Not revolutionary but it seems pretty much similar to Turtle Wax or whatever...It has a noticeable powdery build up which collects and stays in the cracks and crevices, not great for paint, lined stripes, etc. Despite claims, I think it still has an abrasive component too. although very mild.... IMO not any better or worse than all the rest.
But if one uses Simichrome or whatever aluminum polish to bright shine the parts, maybe it is wise to come back with a protective /sealing product like this to sustain the shine ...? It sure can't hurt....
Dale Brown
Greensboro, North Carolina