Decorator (noun)

1. One who decorates, especially the inside of buildings, with a view to making them beautiful or ornamental.
2. A device or brush used to apply decoration or coloring to a surface.

Origin:

From decorate +‎ -or.

Examples:

1. The decorator did a fantastic job of transforming the old house into a beautiful, modern home.
2. She hired a professional decorator to help her choose the furniture and color scheme for her new apartment.
3. The cake decorator used a variety of icing techniques to create a stunning design.
4. The artist used a decorator to add intricate patterns and details to the furniture he created.
5. The decorator brush was perfect for applying the finishing touches to the mural.