Steel wheels

My 08 CE has no wheel covers. In fact most I see don't have them either. I want to use a metal trim ring and a center cap. Can you use a center cap on the plain steel wheel or are those only for the alloy wheels like the S model has? My 74 Corona had a gray painted wheel with trim ring, chrome lug nuts and center cap that looked good.

Or if this isn't possible, can you use a cap that covers the lug nuts like on my Ford Ranger?