Have you given ceramic/powder a thought?
You could achieve 98% of the look of polished with 100% easier maintenance?
Here are a couple examples local to me... I'm sure you'll have the same or similar local to you.
High Performance Coatings
High Performance Coatings | Appearance Coatings
JET HOT (see "Jet Hot sterling" for things that don't run super hot ie: water pumps, manifolds, pulleys, valvecovers, blah blah blah).
www.jet-hot.com.au - Products
...and Just for CSX3183 - Oh no you didn't! The gloves are off!
I like me those purple things... I says it makes my car fasterer.
...and the shinny engine coupled with those purple K&N filters will increase your hp by 23.45%, and make your car significantly faster!
...and, and, and, I'm totally out of unsubstantiated claims
