hood = roof?
I don't recall what mine look like. They are always there but I am not near my car so I can't go look.
It's easy though, if they are painted strip them and repaint. Otherwise then they were plated or anodized and will require being sent off for redoing of the coating.
Aluminum w/no coating that I'm aware of. At least not chrome or anything like that for sure.
Polish (factory finish is matte, not shiny, at least in the 1980's US spec anyway) then if you feel compelled, hit them with a thin coat of clearcoat in matte, satin, glossy (whatever floats your boat) if you want that appearance to remain w/o having to buff it up periodically.
Matte w/satin would likely be the closest to how they came.
Mine came up OK with Autosol chrome polish. Depends how much "patina" they have on and how close to factory fresh you want. Not sure I would bother with any clear coat, did mine a year or so ago and not realy deteriorated since then - just stayed a satin / matte finish.
What are you doing for the leather straps? someone making new ones for you?
Are they leather ? mine seemed to be more like a double layer of vinyl heat welded together .