This month, I checked my photo folder for any Christmas-oriented models. Here’s one, from the days when I couldn’t take good photos, lol.
As you can see, there are four colors of paper: Green, Red (with a white back), silver foil, and patterned green. The silver foil and patterned green are just small squares inserted directly into the model. When most people look at this, they think, “Shiny!” but when I look at it I think “Inserts are such a good idea, I should use them more often!”