Classic Seersucker blazer by Talbots kids - size 18

Classic Seersucker Blazer Talbots kids Size 18 Blue & white Lined in white - white buttons Pockets & vent still stitched Wore once for a photo - then never again *noticed small spot when photographing- did not attempt to remove, but added photo to show. Looks like something that would come off. If I had baby wipes handy I’d try… but I don’t ¯\_(ツ)_/¯