First off, these are really cool wheels. I just went to the iConfigurator and was able to see every one of there products on a picture of my 2015 VW CC. That's "attention to detail".
If there is a clear coat on them you have every option available to you. Collinite 476/845, You can even coat them with Opti-Gloss, cQuartz, Pinnacle, Wolfgang, McKees, etc...
Bear in mind Rotiform's warranty.
http://www.rotiform.com/page.cfm?t=rotiform-warranty&id=31
particularly.....
12) Keep wheels clean. The chrome, clear coat or aluminum finish will be damaged if foreign material, brake dust, dirt or chemicals are not removed promptly. NEVER CLEAN WHEELS WHEN THEY ARE HOT! Clean wheels regularly with mild soap and water only. The finish of your wheels may be permanently damaged by caustic soap used on some commercial car washes. Any abrasives, steel wool or chemicals applied to your wheels may damage the finish.
Notice their use of the word "may"... if you do it right you can treat the wheels properly and not even come close to voiding the warranty.
Here is another good link on AGO for you. At the bottom are 4 HOWTO's that cover the gamut...
Tire Dressings, rubber protectants, tire shine