Welcome to the forum Sebourn, from beautiful Kentucky.
I like my tires always at the maximum pressures advised by the manufacturer on the sidewall. (15"/65#). When my rig was new, the "China Bombs" lasted less than 3000 miles! Load range C with 2 ply sidewalks did not carry the weight. I have been very happy with my Carlisle tires. They have traveled about 30,000 miles with no incidents. If/when you buy new tires go up one or two load ranges and be sure to have them balanced.
There are members of this forum who have had no problems with the stock tires, they will attribute that to diligence in keeping air pressure at the proper number and visually inspecting the tire often. Or just plain luck! There are many horror stories also.
Wax the wheel to see if it will clean up. If not, Auto Zone, WalMart, PepBoys or others sell nice plastic wheel covers that you might like better. Painted wheels are notorious for chipping, peeling, rusting. Best wishes with what ever works for you.
2001 Ford F-350 Super Duty CC Dually, 7.3 Diesel
2013 832IKBS Flagstaff Classic Ultra Lite, Hensley Arrow Hitch, Carlisle tires
2016 days camped....211, it ain't over yet!
On the road to ALASKA May 6, home Sept. 13, 2016. 23 states, 3 Canadian Provinces, up to the Arctic Circle, 17,300 miles, 131 days on the road. 1 flat tire, 4 oil changes. What a beautiful trip!