Final answer:
A restorer checks for frayed edges, sun damage, and water marks on draperies before cleaning to avoid worsening preexisting damages and to determine the best cleaning method.
Step-by-step explanation:
A restorer planning on cleaning and deodorizing draperies will inspect the drapery for the following preexisting damages: frayed top and bottoms; sun-damaged fabric, or water marks. These types of damages are commonly checked to ensure that the restoration process does not exacerbate any issues and that any repairs needed can be addressed. In the context of fabrics and textile restoration, the previously given options such as a colorful, faded, sharper, or curved pattern are not direct indicators of damage but rather descriptions of the drapery's condition or design. Nonetheless, a restorer may also document these aspects as they could influence the cleaning methods employed.