Scored myself some 15 x 6" R30 skyline rims

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They're a bit ratty, but will tidy up o.k.
I want to keep them silver to stay with the blue / silver colour scheme on my ute, but I'm undecided whether to re-paint in say a silver metal-flake or to polish them back up.
Perhaps a combination of both.....
what do you guys think?
Also - Any advice on tyre choice would be welcome....
I'm thinking 185's on the front & 195's on the rear.
I want a reasonably low profile though to avoid fouling the guards, but also want to fill the wheel arches.
I was thinking between a 45 & 55 profile, but I've heard 45's can be hard to find & expensive.
I've also heard some brands make a 50 profile......
Also looking for something reasonably sticky.
What are you guys with 15's running?