NWT WHBM White Colorblock Boot Skirt size 8 - spots on back barely noticeable

New with tags size 8 White House Black Market skirt. Ecru in color with tan and black color-block detail. Pleat/opening in front is approximately 8” long. Please be aware: There are some spots/stains on rear left side of skirt, all within 6-1/2” of the bottom of the skirt. I used a bit of water and light agitation on the spots. The larger spot faded quite a bit to where it is barely noticeable (see 3rd to last photo for the “before” and the last two photos for the “after”. One of the small spots did not fade much - see 4th to last photo. I did not want to rub too hard to damage fabric fibers. It is very unlikely they will be noticed by others while wearing the skirt. Zipper is in back. Skirt measures approximately 15-1/2” across waist lying flat. Length of skirt is approximately 19”. Comes from non-smoking home.