I have 3-4 Exterior Mobile Homes, I am currently bidding on. They are 14×77 each has roughly 8-9 windows with 2 doors. They all have aluminum siding panels with screws. The Screws are rusty on the head surface only and you can see what appears to be rust running down

In the room there are stained glass windows in which gold is the predominant colour. What colour will suit best to minimize this? What affect will this have on the colour that I choose?