I use “Cape Cod” - polishing cloths - for a silky smooth finish on my metal bracelets with polished center links. I have just looked at the packaging and it can be used on gold as well as other metals.
https://millenarywatches.com/what-is...-gold-made-of/
don’t see why you need to worry about being white gold in Rolex’s case - it’s not a coating.