I have a chrome '73 P12 and a Yellow '71 P15. The P15's are great (The P12's are also, but that's a different topic). For the chrome any chrome polish should work. With the rust on chrome, I usually start with Aluminum foil crumpled up with some WD 40 sprayed on it then progress to polish. It works wonders.
My P15 came with 27" wheels, I believe that what was generally used, so the wheels may have been re-laced (or replaced) for the tubulars. I have two sets (OK maybe more) of wheels for the P15 so I mostly run tubulars but will with back to clinchers depending on my mood (or the ride).
This looks like it will clean pop really well. Have fun with it.